Fran Jurga`s Hoofcare + Lameness

Friday, February 18, 2011

No Farrier, No MRI: Diagnostic Imaging Sessions Begin With Careful Un-Shoeing

If you’re a farrier or horse owner who is new to equine MRI, you might be surprised to learn that most horses couldn’t have an MRI without the help of farrier skills.

That’s because horses that are shod must have their shoes removed before the MRI process can begin. This could be done before the horse leaves home, but it is usually done at the vet clinic where the MRI will be done, since the horse may need to be trotted or lunged as part of the diagnostic process.

An MRI session begins long before the horse's limb is scanned. It begins with an exam and the removal of both front or hind shoes, if the horse is shod.

For advice on the gentle art of shoe removal, Hoofcare + Lameness went to one of the world’s best authorities, Dave Duckett FWCF. A former farrier instructor at the national schools in Great Britain and Ireland, Dave is an undisputed expert analyst on the fine points of shoeing and unshoeing a horse, as his many world championships and other titles attest.

Duckett reminds us that a lame horse that is having an MRI may have some resistance to standing on three legs during shoe removal. It may also resent having its hoof walls tapped with the hammer to cut the clinches. For this reason, it may be safest to do the work at the vet clinic.

Pulloffs should be used from the heel forward, gently removing the shoe without harming the hoof wall, but it is best to remove the nails with a creased nail puller. (Michael Wildenstein file photo)

Normally, a farrier might rasp off the clinches and an apprentice would go to work loosening the nails and then wrenching the shoe off the foot. With the shoe will come the nails, but farriers know full well that some may break. It may not happen often, but nail fragments can remain in the foot.

When and if this happens on the day an MRI is scheduled, the fragment will need to be found and removed, since any metal might disturb the magnetic function of the scanning system.

There are many reasons that nails break off. Duckett remarked that nails commonly corrode and break in the feet of horses that have been standing in urine-soaked bedding or manure-filled pens. The longer a shoe has been on, the more likely the nails are to break on any shoe, he added.

The design of the shoe itself can cause a nail to break off; the shape of the nail hole may be wrong for the size or style of nail that was used, so the nail fractures under the head. If the nail hole is too small, the edges of the hole shear the side of the nail as it passes through, weakening the shank, increasing the likelihood of fracture, and possibly creating soft steel dust particles that are carried up into the hoof wall. “The shoe doesn’t give, the nail does,” Duckett said, “and it usually fractures under the head.”

Cross-section of toe nails in foot, showing clinches (Michael Wildenstein file photo)

Duckett also warned about machine-made shoes that are hot fit, then quenched before nailing. This hardens the steel of the shoe around the hole, so the soft steel of the nail is likely to shear more as it passes through.

The constant expansion and contraction of the horse’s foot causes stress to the nail inside the wall, and can also lead to nail fatigue and even breakage, usually on the inside heel or both heels, according to Duckett.

It's safer to cut the clinches and pull the nails through the wall rather than rasping the clinches off and thinning the hoof wall of a horse that may already be lame. (Michael Wildenstein file photo)

So, instead of rasping off the clinches, or even just bending them back, the clinches should be cut off; this can be a challenge for someone not accustomed to finding the clinches in a recently shod foot, especially on the inside wall.

Creased nail pullers allow careful remove of each nail; the jaws can get down into the crease of the shoe. (Michael Wildenstein file photo)

Once the clinches are cut, each nail should be gently pulled through the foot with the creased nail pullers with a continuous pull, not a yank. Vet clinic farriers quickly learn to count their nails, check each one for its full length, and keep them in a little tray or cup to account for each foot’s nails.

Duckett pointed out that some clinches, if not cut, will break off occasionally and be lost inside the foot. This can be an inconvenience if a horse is scheduled for an MRI. He said that an experienced farrier will be able to pop a nail into the old hole and extricate the lost bit of metal.

The unshod foot will be cleaned and examined. As Hallmarq’s Nick Bolas pointed out, metallic dust can also be created by a rasp or by rust from shoes or the horse’s environment.

And that just won’t do for a horse that has a date with a huge magnet. Any sort of metal residue on the hoof wall or inside needs to be removed before the scanning begins.

Nail holes can be flushed with a cleaner—I fully expect a special product to enter the market any day now! A product like Life Data Labs’ Hoof Disinfectant is probaby found in most farriers' trucks and will do the job.

Even the tiniest artifacts show up and can be magnified in an MRI scan. In this image, you can see a few glitches along the hoof wall. (Hallmarq MRI image)

10 TIPS FOR MRI SHOE REMOVAL SUCCESS

Working with Hallmarq Veterinary Imaging Systems, Hoofcare + Lameness came up with these tips for horse owners, clinics and farriers for pre-MRI hoof prep:

1. Owner: ask the vet clinic who will be pulling the shoes. Some owners may prefer to schedule a farrier appointment and make sure that the horse's regular farrier does the work. The owner should make sure that this farrier knows what s/he is expected to do so the correct tools will be on hand. It is most convenient to have the work done at the clinic.

2. Owner: Make sure that a farrier with Hallmarq MRI prep experience will be doing the work so that the procedure described above will be followed. The horse owner may also need some supplies. Some owners may prefer to leave the shoe pulling to the farrier working at the vet clinic.

3. Owner: Make an appointment for the horse to be re-shod after the Hallmarq MRI is completed; this can be done at the vet clinic if the farrier is accustomed to working there or makes arrangements in advance. If a diagnosis is expected that might affect the shoeing, delay the re-shoeing in expectation of changes to be made.

4. Owner: Consider the use of padded boots like Soft-Ride Equine Comfort Boots during transport to and from the clinic if the horse is sore without shoes. At the very least, cover the feet with vet-wrap or duct tape to keep them clean. If the horse is traveling to the vet hospital, the feet with be cleaned again but remove any caked-on mud and debris and comb out any feathers and the mane and tail to make sure no metal is hidden in any of the horse's hair.

5. Owner: Do not use hoof polish, gels, sealers or any topical medications on the horse’s legs for 24 hours before the scheduled appointment.

6. Owner: Don’t clip the pasterns unless directed to do so by the veterinarian or Hallmarq MRI technician. The vet clinic staff will usually clip any hair that is in the way.

7. Clinic: Clean the shoes with a wire brush and rinse under running water to remove any dirt and manure. Store them in a plastic zipper-top bag and mark them with the horse’s and/or owner’s name. Sometimes a veterinarian or consulting farrier will ask to see the shoe that was removed from a lame foot to check how the horse “wore” the shoe. Always be careful to properly dispose of nails.

8. Owner: After the shoes are removed and the feet are clean is a good time to take record-keeping photographs of the horse’s feet.

9. Owner: A horse with its shoes newly removed may be a little sore so give plenty of time to load and unload from trailers. If using a commercial service to pick up the horse, make sure they are aware of this. Farriers: make sure that owners or trainers know that this mild soreness after unshoeing is a specific side effect and not part of the horse’s larger lameness issue. Depending on clinic policy and arrangements made in advance, owners should be prepared to receive a partially-unshod horse after the MRI is complete.

10. Clinic, owner, farrier: Education is critically important to the success of the horse’s MRI scan. Learning how to properly use farrier tools and which farrier procedures are considered Best Practices in the preparation of a horse for MRI scanning is a new area where we all have a lot to share and learn from each other.

A carefully unshod horse whose clinches were cut (not rasped) and whose nails were removed with a creased nail puller is a welcome sight to the farrier who will be re-shoeing the horse; if he or she needs to re-use the nail holes, the wall won't be rasped away and if the shoes are re-used, it is not likely to be twisted in the heels. (Gary Huston photo)

In this age of MRI, Hallmarq recognizes that farriers are both needed in this important first step in preparation of the horse for MRI, and that farriers will be involved throughout the process of caring for the horse during its rehabilitation from the lameness that the MRI should help diagnose. For this reason, Hallmarq Veterinary Imaging is dedicated to including farriers in education programs and studies.

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Watch for more in the Hallmarq-sponsored article series on The Hoof Blog, and check their social media system and especially their info-deep web site for lots more information.

To learn more about Hallmarq Veterinary Imaging and standing MRI technology for horses:

• Become a fan of the new Hallmarq Equine MRI Facebook page;

• Follow @HallmarqMRI on Twitter;

• Subscribe to the hallmarqvetimaging channel on YouTube.com;

• Watch for a growing equine distal limb Hallmarq MRI image gallery on Flickr.com;

• Visit the Hallmarq.net web site. (Plan to spend some time there!)

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Thursday, February 17, 2011

New Oklahoma State Board Would Make Veterinary vs Husbandry Decisions for Professional Practices

There have probably been simpler times to be in the animal care field. Now you not only have to know what you're doing, but if you can legally do it.

As states continue to grapple with definitions of what the practice of veterinary medicine actually entails compared to the routine practice of animal husbandry, national attention turns again to the state of Oklahoma, which was recently wrenched by a battle over whether floating teeth and other aspects of what has come to be known as equine dentistry should or could legally be done by non-veterinarians in the state. That fight spilled over to other routine practices, particularly related to animal reproduction, that are performed at livestock facilities in the state.

It was a short-lived victory for ranchers who don't want to have to hire veterinarians for routine artificial insemination procedures, or for non-veterinarian professionals in the state who wanted the assurance that they were performing their work legally; the governor quickly signed emergency rules proposed by the Oklahoma State Board of Veterinary Medical Examiners to prevent non-veterinarians from performing some tasks.

http://www.oklahomafarmreport.com/wire/news/2011/01/02677_Rehash3202AnimalHusbandry01212011_064424.php

This audio report from the Oklahoma Farm Report summarizes steps that led up to this week's action in the Oklahoma legislature.

To the state lawmakers and vet board's credit, a compromise has been put forward in the form of House Bill 1310, which would create a new board, tentatively called the Animal Technology Advisory Committee, made up of three veterinarians and three non-veterinarians, and chaired by a non-voting veterinarian. This board would examine procedures and decide whether they fall under the practice of veterinary medicine or animal husbandry.

HB 1310 passed out of committee yesterday and now is headed to a vote by the entire legislature.

The legislature has not made the text of HB 1310 available to the public on their web site yet.

The composition of state veterinary boards varies from state to state. In some states, the board includes non-veterinary members. In Oklahoma and Florida, five of six members are listed as veterinarians; in Ohio, four of six; in Massachusetts, four of four; in California, four of eight.

© Fran Jurga and Hoofcare Publishing; Fran Jurga's Hoof Blog is a between-issues news service for subscribers to Hoofcare and Lameness Journal. Please, no use without permission. You only need to ask. This blog may be read online at the blog page, checked via RSS feed, or received via a digest-type email (requires signup in box at top right of blog page). To subscribe to Hoofcare and Lameness (the journal), please visit the main site, www.hoofcare.com, where many educational products and media related to equine lameness and hoof science can be found. Questions or problems with this blog? Send email to blog@hoofcare.com.

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Disclosure of Material Connection: I have not received any direct compensation for writing this post. I have no material connection to the brands, products, or services that I have mentioned, other than Hoofcare Publishing. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: Guides Concerning the Use of Endorsements and Testimonials in Advertising.

Necropsy Report: British Horses Died of Cardiac Arrest; Signs Consistent with Electrical Shock from Leaking Cable Under Paddock

The British Horseracing Authority has provided a summary statement following the completion of necropsy studies on the bodies of two horses that died at Newbury Racecourse in Berkshire, England on Saturday. The horses collapsed and died as the jockeys were preparing to mount; two other horses fell but were able to recover.

Professor Tim Morris, Director of Equine Science and Welfare for the British Horseracing Authority, issued this prepared statement today:

“The Authority has been officially informed that there was leakage of electricity from a cable under the parade ring in the area where the incident occurred. There was immediate veterinary attention, and our enquiry on the day noted the racecourse veterinary surgeons felt a tingling sensation when examining the horses, and that the veterinary surgeons noted particular clinical signs such as muscle contractions.

“Both horses that died, Marching Song and Fenix Two, have undergone postmortem examinations which showed sudden cardiac arrest as the cause of death. Samples taken from the horses affected have shown no evidence of substances that could have caused this incident. These findings are all consistent with the cause of death being accidental electrocution and at this stage we are not investigating any other cause of death.

“I can also confirm that, contrary to speculation, no evidence of any burn marks around the mouth was found on post mortem examination, neither were such marks found by the veterinary surgeons on the horses at the start.”

The necropsies were performed by pathologists at the University of Liverpool’s School of Veterinary Science with additional services from the British Horseracing Authority contractor HFL Sport Science.

Much speculation has surrounded whether the horses' shoes were part of the formula that led to their death. Metal horseshoes are known to conduct electricity; horses are especially susceptible to electrical shock. Some people have speculated that the fact that the horses who died were shod with steel shoes, while the horses who survived were shod with aluminum, may have been a factor in the tragedy.

So far, there is no proof that that is the case.

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Monday, February 14, 2011

A Hoofcare and Lameness Valentine to You

The richest source of old advertising art featuring horseshoes is not from a horseshoe company at all. Many people think that Drummond Horseshoe brand was meant for a horse's hoof, but it was actually a tobacco company from St. Louis, Missouri.

Fortunately for us, the company employed some of the best advertising illustrators of their day, and they left a rich archive of ads showing horseshoes, farriers, and horses' hooves. Someone should do an exhibit of their art!

So, thanks to some long-gone artist who created this cherub at the anvil long ago. Maybe he or she would be happy to know that, a century later, some of still appreciate the artistry in the company's ads.

And to all of you, enjoy your champagne, chocolates and roses, all around the world!

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Silent Anvil: Bob McCarthy

Bob McCarthy, the senior statesman of Boston-area farriers, has died.

Farrier friends: The late Allen Smith, left, with Bob McCarthy, right, circa 1988.

Wake 4:00 - 8:00 p.m. on Thursday, February 17
Funeral Friday, February 18 at 10:00 a.m.
Roberts Mitchell Funeral Service
15 Miller Street, Medfield, Massachusetts 02052
508 359 2000

"The end of all our exploring will be to arrive where we started and know the place for the first time.

--T.S. Eliot, Four Quartets

There was a time when I might have been guilty of assigning a high degree of respect for people that was in some sort of direct proportion to the number of hours it would take me to fly to where they lived. As exciting as it is to travel the world, most people stop somewhere, and find a place that they'll call home. I always kept coming right back here, right where I started and like TS Eliot, who grew up spending summers on the road where I live, it has taken me years to understand what my homing instinct was all about: there was simply no better place on earth for me to be me or to do what I wanted and needed to do.

It had something to do with the people. A lot to do with the people. And I am finally beginning to see it, and know it, for the first time. Just as some of them are slipping away.

I've written a thousand stories about farriers in the Boston area and the Southern New England Farriers Association, which began here in the early 1980s and still carries on. But until the late days of Allen Smith's life, I didn't really understand how it all worked. Or why it worked. I didn't want to analyze something, for fear of jinxing it, and losing Allen was like a spring breaking through a sofa cushion.

Bob McCarthy was a big reason why things worked in the farrier world around here, Allen explained to me one day. I'm hoping that one of the farriers who was close to him will write something about him for the blog but I can tell you what I saw of his character over the years, which was that Bob absolutely had the respect of all the farriers in the Boston area. He didn't demand it, they gave it.

When I came along, there were two senior farriers working who knew the farrier business and had the best accounts: Dick Ham and Bob McCarthy. They were both friendly and generous to the younger farriers, and encouraged them. Dick died quite a while ago, but Bob was helpful in forming the Southern New England Farriers Association, served as its president for many years, and advised behind the scenes for many more. I wonder now how different things might have been if Bob hadn't agreed to be part of SNEFA.

Hardly a politician, Bob served as a stabilizer and a peacekeeper, because no one would ever want to be seen in a bad light in his eyes. Bob was very soft-spoken and made most of his points with a curl of his lip, a raised eyebrow, or a soft grunt. He was gentlemanly, but with a twinkle in his eye; he always seem bemused by what went on around him.

If you saw Bob at a horse show, you'd think he was an owner, not the farrier, until he put his apron on; and when the farrier organizations began talking about establishing vet-farrier relations years ago, Bob was already on a first-name basis with everyone they needed to know.

Bob McCarthy didn't have to say much, and when he did, it would usually have a punchline. He personified the difference between being influential and wielding klout; he didn't seem to have anything to gain, so malice wasn't part of his brand--although mischief certainly was.

Democracy is a wonderful thing. Equality among peers is admirable. But every truly successful civilization recognizes and values its elders. And certain elders accept that they have a responsibility to step forward, or stay accessible, to serve as mentors and role models. With grace and a sense of duty, they impart their wisdom, along with their technical knowledge, to benefit the next generation.

And some, like Bob, never lose their sense of humor, or take themselves too seriously, which makes them very easy to be around.

As sad as I am tonight, I'm sadder still for Myron and Owie and Garth and Freddy and John and Dave and Tom and Alvin and all the others who had a special friend for the past 30 or more years. Someone who was not just a very fine horseshoer--which he certainly was--but who understood all about the challenges they faced trying to make a living.

The Boston area may be a tough place to raise or train or keep horses, but Bob McCarthy helped make it a great place to be a horseshoer. And to be me.

Saturday, February 12, 2011

Electrocution's Shocking Effects on Horses

From the annals of Hoofcare and Lameness Journal and the Hoof Blog, here are some memorable accounts of horses who have lost their lives or been injured or at least caught my attention by their ability to conduct electricity:

In 2004, Horse and Hound told us about a horse that really got a warmup before the cross-country phase at the Blenheim Petplan International Horse Trials in England. Special Agent Wal had his studs in when he perforated a power cable with one of them. It gave him such a shock that he was thrown to the ground. The veterinarians still cleared him to go and he jumped a clear round. Way to go! Is that what the Brits mean with those "Keep calm and carry on" signs?

In 1999, a seven-year-old Manhattan carriage horse named Jackie stepped on a steel Con Edison service box cover on East 59th Street. She reacted by kicking her driver in the head, then collapsed and died. A spokesman for Con Edison said that the use of salt in winter may have corroded wires underground and that humans wouldn't feel the electricity because they don't wear metal shoes. But poor Jackie felt it on a rainy day, in a big way.

In Ireland in 2005, the Dublin Horse Show champion Dimmer Light and a stablemate were electrocuted when a short circuit from a light switch in their stable yard electrified the ground and gates, according to a very sad news report in Horse and Hound that I have kept tucked away. I think the ironic match of the cause of the short circuit and the horse's name always intrigued me as much as the electrocution angle.

One of my favorite all-time horse safety articles is from Windy Meadow Farm in Maryland. Eventer Michael Hillman was challenged by his water trough. Little did he know that every time his horse tried to take a drink of water, he was getting a shock to his lips! Michael's article, Dear Diary, I Almost Electrocuted My Horse Today is a classic. So is everything he writes!

My friend Cyrstal Kimball, editor of The Equiery in Maryland, told me a story about a time when she was out hunting and the entire field came upon a hot spot. "It was a downed electric fence, still hot, that electrified the wet ground in the surrounding area, and when the field hit it at a dead run, horses were winging off in all directions..." (But it sounds like they lived to tell the tale.)

None of us can remember exactly where or when the show was, but a dressage show in the Northeast had a hot spot inside the arena. Every time the horses came to the spot in the ring, they reacted.

And then there was the one about the horse owner who was driving down the road and had his trailer struck by lighting, leading to an electrical fire in his horse trailer. So it seemed like a really smart idea to drive right into a carwash. The horse was electrocuted and died.

Horseshoes and thunderstorms don’t mix: This old photo shows what was once an unsettlingly common occurrence in America: multiple horse deaths due to electrocution in thunderstorms. This six-horse hitch of Percherons owned by the Christy Brothers Circus was struck by lightning on September 1, 1923. They were hitched up for the circus parade when lightning hit a transformer nearby. The wet mud surrounding each horse’s shoes provided a perfect field. In addition to this team, four horses pulling the calliope and eight horses pulling the lead circus wagon were killed. And a few people, too. Thanks to the Wisconsin Historical Society and Circus World Museum for the loan of this photo.

Speaking of lightning, that is probably the most common way that horses are electrocuted. I'm still struck by the imagery in this amazing story about a polo player's horse trailer and his ponies being struck in New Jersey in 2008. They all survived but I just can't forget the description of the ponies going down "like dominoes". For your own safety's sake, read the article, which has a lot of good information about lightning strikes.

A horse named Sadie survived being struck by lightning in 2001. Her owner looked out the window and saw a cloud of orange smoke where her horse should have been. She ran out and found the horse on the ground; the horse got to her feet after a while and staggered around. After a few weeks she was fine, except for lingering foot soreness. Her vet attributed her survival to the fact that she wasn't shod.

We all live in a tangle of wires, in an environment with increasingly severe weather and crazy service problems for our utilities. Our horses, even if they aren't shod, have plenty of metal on their tack, hang out by metal gates, live behind electric fence, and require heated waterers in their paddocks in winter and electric fans in their stalls in the summer. The possibilities for any of us to be zapped at any time, in any barn, are high.

Think about what you're touching, especially with your bare hands on a wet day, and keep an eye out for horses that might need help. And if a horse is acting completely out of character, there might be a good reason why.

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