Diarrhea in Newborn Foals

Date Published: 11/07/2005
Date Reviewed/Revised: 06/27/2016

Diarrhea in newborn foals can develop as a result of inflammation in the GI tract, decreased motility, increased secretion of fluid in the tract, and other causes. Studies show there are several risk factors for diarrhea in newborn foals, and one of these is using shavings as stall bedding as well as using antibiotics in the foals. You can decrease the incidence of foal diarrhea by disinfecting your foaling stalls, washing the mare's udder and tail before foaling, and foaling on pasture instead of in a stall.

Diarrhea can be due to an infection or may be non-infectious and the most common type of non-infectious diarrhea is foal heat diarrhea. Dr. Gary Magdesian indicates in the Clinician that foal heat diarrhea usually occurs from five to 21 days of age and usually resolves without any treatment. However, it is possible some of these foals can dehydrate and will require fluid therapy. It was previously thought that foals developed foal heat diarrhea when the mare came into heat and that a hormonal change in the mare's milk led to a foal's diarrhea. It was also believed by some that a parasite was the cause and to prevent this mares were dewormed immediately after foaling.

However, it is now known that the diarrhea is not due to changes in the mare's milk or a parasite but to normal maturation of the foal's GI tract. The bacteria in the foal's GI tract changes and becomes similar to the adult's normal flora by four weeks of age and the diarrhea usually resolves. So foal heat diarrhea is a normal sign that occurs in almost all foals and is due to the foal's initial ingestion of feed, plus ingesting the dam's feces if the tail is not washed prior to birthing.

The content of this site is owned by Veterinary Information Network (VIN®), and its reproduction and distribution may only be done with VIN®'s express permission.

The information contained here is for general purposes only and is not a substitute for advice from your veterinarian. Any reliance you place on such information is strictly at your own risk.

Links to non-VIN websites do not imply a recommendation or endorsement by VIN® of the views or content contained within those sites.

Top
SAID=27