Why management of the pregnant mare is so important.
Horse owners and breeders can make the foaling process easier on themselves and their mares by paying careful attention to some important details.
Vaccinations and foaling location:
- It is important that the foal receives the first milk or colostrum to protect it against infections. The mare should be vaccinated against tetanus and brought to the foaling location at least one month before foaling. This allows her to produce colostral antibodies and confer some immunity to organisms in the foaling environment that cause joint ill, scours and septicemia. The incidence of diarrhea in foals is up to 63% higher in foals born to mares bought to new locations for foaling, than it is in foals of resident mares.
Colostrum:
- The foal can only absorb colostrum for 12 to 18 hours after birth – after this, the gut cells change and even if colostrum is given it cannot be taken up by the foal. If there is any doubt about the quality or quantity of colostrum, the foal should be given at least one liter of frozen colostrum before it is 6 hours old. Frozen colostrum must be brought to room temperature slowly. Overheating with hot water and defrosting in a microwave damage the protective proteins. Some breeders routinely monitor the foals’ immunity at 12 hours of age and many insurance companies require documentation of adequate immunity before insuring a foal.
Running Milk:
- Anywhere between 3 and 25% of mares have reduced quantity or quality of colostrum. It is especially important to have a veterinarian assess the colostrum in mares that run milk prior to foaling. Running milk often occurs when mares are fed too heavily during pregnancy and after foaling. Mares must receive correctly balanced mineral, vitamin and essential amino acid intakes, but if the pasture is unusually lush and improved or excessive amounts of starch are fed, they may be at greater risk of running milk and over-producing milk. This can result in loss of colostrum and afterbirth; increase the risk of foal diarrheas. Strong healthy foals may get gastro-intestinal overload, which can lead to diarrhea.
Foal heat diarrhea:
- Milk over-load is often associated with foal heat. This can occur if the mare is fed too heavily during pregnancy and after foaling. This does not suggest complete removal of good feed, as this will result in loss of milk and /or reduced fertility.
Recent Question
Q - I really need to know when a horse starts producing milk and how long will it be till the mare starts to foal?
A - A mare’s mammary glands (udder with two teats) will enlarge and begin to secrete a milky material within a few days of labor. There may some swelling of the abdominal wall near the udders about the same time as the mammary glands secretion begins, particularly in the first pregnancy.
The vulva swells and usually a discharges a thick mucus. Other signs include relaxation of the abdominal wall with sinking of the flanks, dropping of the belly and sinking of the rump on both sides of the tail head.
As the time of labor gets closer, the mare becomes restless, usually seeks seclusion, lies down and gets up frequently, attempts to urinate often, and then begins actual labor.
Milk is secretion begins at the time of labor so when the baby is born they can begin to get colostrum. Suckling the teats by the baby is a stimulus for the milk let-down reflex. This gets the milk flowing for the baby.
To see more Questions and answers please visit our horse nutrition blog
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