Poisoning & Toxicity

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High-Tech Tools Uncover Cause of Mustang Deaths

Forensic scientists solved the mystery of what killed a large portion the the wild mustang herd in southern Nevada using a technique called stable isotope ratio mass spectrometry. In July 2007, 71 horses of the 250-head herd of wild horses were…

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Avoid Moldy Corn in Horse Feed

Farmers across the Midwest struggled last year to harvest their crops in what turned out to be an unseasonably wet autumn. These conditions led to reports of widespread mold in this year’s corn crop. Moldy corn is a hazard for all species o

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tall fescue; Endophyte Infected Tall Fescue

Managing Pastures to Avoid Tall Fescue Toxicity

Broodmare farm operators in the southeastern United States are interested in managing tall fescue toxicity because of the pregnancy complications it can cause.

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University of Kentucky Researcher wins Prestigious Award; Will be Honored by President Obama

David McNear, PhD, assistant professor of rhizosphere science in the University of Kentucky’s (UK) Plant and Soil Sciences Department, was recently awarded the Presidential Early Career Award for Scientists and Engineers (PECASE) for his research on endophyte-infected tall fescue and how it impacts soil microbial communities, chemical properties, and nutrient cycling.

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Toxic Ragwort Warning Issued by UK Group

Land and horse owners are reminded to be on their guard against deadly ragwort following the inclement weather of July and August, World Horse Welfare noted in a statement Aug. 13.

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Toxic Mushroom Risk for Horses in Kentucky Pastures Due to Wet Weather

At the beginning of August, the University of Kentucky’s Livestock Disease Diagnostic Center (LDDC) received several calls regarding the presence of mushrooms in pastures around eastern Kentucky. Callers were concerned about whether it presented a problem for livestock to graze on pastures with mushrooms.

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Grazing Horses in Moderately Polluted Areas

Horses might serve as good management tools for pastures moderately polluted by trace elements, according to Spanish researchers. And provided the animals receive adequate, systematic monitoring through biological sampling, they can be kept on

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Poisonous Hemlock: A Growing Problem

The association of poison hemlock with the death of Socrates in ancient Greece in 399 B.C. provides a glimpse of the toxic history of this plant. Two decades ago an aggressive search was required before a specimen could be found in Arkansas, but no

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Aluminum Phosphide Poisoning

Aluminum phosphide is an indoor fumigant used to kill insects in most, if not all, of the stored grains we and our horses are exposed to. Like most pesticides, it can cause major problems in unintended species when used incorrectly.

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Ivermectin Toxicosis

Ivermectin has become one of the most widely used deworming medications worldwide since its introduction 25 years ago. It’s usually considered to have a large margin of safety, but it can be highly toxic in rare circumstances

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Fifth North Carolina Horse Dies of Unknown Toxin

A mystery toxin killed a fifth horse in western North Carolina in November. Veterinarians now suspect this case might be due to the same substance that caused the death of four other horses earlier that month.

The fifth horse was

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Stable Air Quality a Breath of Fresh … Endotoxin?


If you think you are pampering and protecting your horse in his cushy, comfortable stall instead of turning him out on pasture, think again. Michigan State University researchers have found that stabled horses are exposed to eight

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