Friday, February 24, 2012

Management of insulin resistance with supplements

Insulin resistance (this is now the preferred term over "metabolic syndrome") is related to multiple health issues in horses, particularly an increased incidence of laminitis. Several supplements on the market are marketed to help control insulin resistance in horses with magnesium and chromium. This study, done at New Bolton Center and University of Tennessee College of Veterinary Medicine, indicates that these do not have a measurable effect on affected horses and ponies.

Effects of a supplement containing chromium and magnesium on morphometric measurements, resting glucose, insulin concentrations and insulin sensitivity in laminitic obese horses

  1. K. A. CHAMEROY,
  2. N. FRANK*,
  3. S. B. ELLIOTT,
  4. R. C. BOSTON

Article first published online: 29 SEP 2010

DOI: 10.1111/j.2042-3306.2010.00302.x

© 2010 EVJ Ltd

results and conclusion:

Results: Hyperinsulinaemia (>30 µu/ml) was detected in 12 of 14 horses prior to treatment. Glucose and insulin data from one mare with clinical laminitis were excluded because of persistent pain. Mean ± s.d. insulin sensitivity was 0.64 ± 0.62 × 10−4 l/min/mu prior to treatment for the remaining 13 horses. Time and treatment × time effects were not significant for any of the variables examined, with the exception of resting insulin concentrations, which significantly increased over time (P = 0.018). Health status remained the same.

Conclusions: The supplement containing chromium and magnesium evaluated in this study did not alter morphometric measurements, blood variables, resting insulin concentrations or insulin sensitivity in laminitic obese horses.

Unfortunately weight loss through diet and exercise is the only proven disease modifier. We all like to please our horses and enjoy seeing them enjoy their food but any horse will lose weight if the calorie intake is reduced enough. Total starvation is a very bad idea and will cause other problems, particularly in obese horses.

Weight Management

If you are trying get your horse to gain or lose weight, knowing the actual amount in weight of hay and grain you are feeding is important. Once this is determined your veterinarian can help guide you in determining the optimum amount to feed your particular horse. A scoop or can is not a measure of grain that means anything. A flake is not a measure of hay that means anything. The only valid measurement is weight. Different feeds will weight different amounts for the same volume. You do not have to weigh every feeding, but weighing the volume measure that you are using will give an accurate result as long as you do not change feed. The average bale of hay weighs from 35lbs to 60 lbs. Either weigh a bale and figure how much a 6 inch flake weighs as a fraction of the bale or weigh your average flake. Round bales in the field count too! You can't measure them, but figure that a horse will eat 25-30 lbs a day free choice. That will be greatly reduced if the round bale is nasty or moldy. Most horses get too much grain and not enough hay, but there are some easy keepers that will not lose weight given free choice hay and no grain. Total hay needs to be reduced to about 15 lbs a day with no grain (for an 1100 lb horse) to make a dent in their weight.

A fisherman's scale should cost $6-$10 and is accurate enough (if you want to splurge, get a digital one for about $20)

To track your horses progress, use a weight tape (usually free at the feed store) They are not perfectly accurate for absolute weight, but they are very accurate in tracking gain or loss. If the number is going up or staying the same and your goal is to reduce weight, the horse is eating too much or not exercising enough or both!

Monday, January 30, 2012

Management of insulin resistance with supplements

Insulin resistance (this is now the preferred term over "metabolic syndrome") is related to several health issues in horses, particularly an increased incidence of laminitis. Several supplements on the market are marketed to help control insulin resistance in horses with magnesium and chromium. This study, done at New Bolton Center and University of Tennessee College of Veterinary Medicine, indicates that these do not have a measurable effect on affected horses and ponies.

Effects of a supplement containing chromium and magnesium on morphometric measurements, resting glucose, insulin concentrations and insulin sensitivity in laminitic obese horses

K. A. CHAMEROY,
N. FRANK*,
S. B. ELLIOTT,
R. C. BOSTON

Article first published online: 29 SEP 2010

DOI: 10.1111/j.2042-3306.2010.00302.x

© 2010 EVJ Ltd

results and conclusion:

Results: Hyperinsulinaemia (>30 µu/ml) was detected in 12 of 14 horses prior to treatment. Glucose and insulin data from one mare with clinical laminitis were excluded because of persistent pain. Mean ± s.d. insulin sensitivity was 0.64 ± 0.62 × 10−4 l/min/mu prior to treatment for the remaining 13 horses. Time and treatment × time effects were not significant for any of the variables examined, with the exception of resting insulin concentrations, which significantly increased over time (P = 0.018). Health status remained the same.

Conclusions: The supplement containing chromium and magnesium evaluated in this study did not alter morphometric measurements, blood variables, resting insulin concentrations or insulin sensitivity in laminitic obese horses.



Unfortunately weight loss through diet and exercise is the only proven disease modifier. We all like to please our horses and enjoy seeing them enjoy their food but any horse will loose weight if the calorie intake is reduced enough. Total starvation is a very bad idea and will cause other problems, particularly in obese horses.

Sunday, December 4, 2011

Changes in the status of horse slaughter

This is a tough subject. There has been a lot of inaccurate or incomplete reporting, but here is a good summary of the facts. If you really want to do something about what happens to unwanted horses see http://www.mdhorsecouncil.org/md_fund_for_horses.htm and its Unwanted Horse Project



From the AAEP:

Congress Passes USDA Appropriations Bill - USDA Inspection of Horse Processing Allowed to Resume

A provision that had prohibited USDA funds being used for personnel inspecting the slaughter process at horse processing facilities was not included in the Fiscal Year 2012 Agriculture, Commerce/Justice/Science, and Transportation/Housing and Urban Development Appropriations bills signed into law by President Obama on Nov. 18. The appropriations bill passed the House on a vote of 298-121, while the Senate voted 70-30 in favor of the bill. The bill funds a variety of federal programs and agencies and is not solely a bill addressing horse processing.

What does the passing of this bill mean for horse processing?

It means that USDA can now pay inspectors to inspect horses and meat that may be processed for human consumption at U.S. plants.

This bill does not, however, appropriate any new money to pay for these inspections. The USDA would have to find the money in the funds appropriated in the FY' 12 bill.

Is there a federal law that has been reversed?

No. There has been no law passed or changed dealing with processing itself. There is no current prohibition on the processing of horses in the U.S. The federal bills introduced in Congress to prohibit this are still before Congress. The only change is that for the past five years the USDA was not allowed to fund the inspection of horses at the plants - even though no plants were open - and now they are should a plant begin operating.

Will horse processing plants open?

While a plant could open and start processing horses, it should be understood that this appropriations bill is only good until September 30, 2012. In addition, as mentioned above, there are two bills currently in Congress proposing to ban horse processing in the U.S.: H.R. 2966 and S. 1176.

Due to state laws passed in Texas and Illinois, the home of the last plants to process horses in the U.S. in 2007, the processing of horses for human consumption in those states, even with USDA inspections allowed, will not be possible. Horse processing also is banned in California.

Does AAEP support the reopening of processing plants in the U.S?

With challenging economic times continuing to impact the United States, the large number of horses in our country that are considered unwanted and without viable care options remains a tremendous concern. Because of the increased potential for abuse, neglect and abandonment faced by this population of horses combined with the lack of financial resources for their long-term care, the AAEP does not oppose the reopening of processing facilities in the United States provided the facilities meet the following provisions:



1. Strict oversight of operations by the U.S. Department of Agriculture under the Commercial Transport of Horses to Slaughter Act and the regulations there under, including the presence of and inspections by USDA veterinarians at the facilities.

2. Horses are euthanized by trained personnel in a humane manner in accordance with the requirements of federal law and guidelines established by the American Veterinary Medical Association.

3. Transportation to the production facility is conducted according to the law and guidelines established by the USDA.

When other humane options do not exist, the AAEP supports processing as an acceptable form of euthanasia under these controlled conditions.

Additional Resources:

History of USDA inspection funding
Since 2007, no federal money has been allowed to be used to inspect horse slaughter facilities in the U.S., as stipulated in the Agricultural Appropriations bill over the past five years. Without U.S. Department of Agriculture (USDA) inspections, horse processing facilities could not process horses for human consumption because the meat could not be shipped internationally or interstate and a majority of the market for horse meat is overseas. Although this clause had support due to the undesirable idea of horse meat for human consumption in the U.S., many, including the AAEP, believe the ban had "unintended consequences" and this was again emphasized in a June 22, 2011 report issued by the Government Accountability Office (GAO) titled - "Horse Welfare: Action Needed to Address Unintended Consequences from Cessation of Domestic Slaughter."

Monday, November 21, 2011

Red Maple Toxicity

Red maple Leaves can be extremely toxic to horses, but the frequency of clinical problems is fairly low. Silver maples can also be involved. These trees are very common and often have been in the horse's paddocks for many years. The toxic principal has not been identified but causes rupture of red blood cells(hemolysis) and methemaglobinemia (...

AAEP White Paper on Theraputics for Performance Horses

http://www.aaep.org/images/files/AAEP%20CLINICAL%20GUIDELINES%20PERFORMANCE%20HORSES%20Final.pdf



This is a consensus paper from the AAEP and is a pretty uncompromising viewpoint. We should all aspire to a mindset where we depend on training and not pharmacology to aid our horses in performing to the best of their ability. It is no favor to the ho...

USEF NSAID rules change as of 12/1/11

A reminder that the rule allowing two NSAIDs expires 11/30/11. After that date only one NSAID is allowed. See



http://www.usef.org/_IFrames/Drugs/Default.aspx