That just means Day 340-342 depending on which date the vet uses. That’s just average. More mares go longer than that than under it. So, keep that in mind. She could still be a month or more away from delivering.
Yesterday the vet was out and noted how relaxed her hind end was and said she thought baby was coming soon. This is a maiden mare so no one knows what she is going to do but she also hasn’t had her milk come in yet.
“Relaxed” can be pretty subjective. The tail laxicity test is a better test than just the muscles. If the mare can still clamp her tail down and resist it being pulled, that’s more telling than butt muscles. However, loose rump muscles shouldn’t just be ignored.
Not all mares produce milk or back up well before foaling. Some only get really big bags and milk just hours before foaling, some not until they actually do foal. So while a huge udder and streaming milk are pretty good signs foaling is very near, lack of an udder is not necessarily a sign foaling is a long way off
This mare has been getting good orchard grass hay for the past few months but they vet is scared she has fescue poisoning from the tiny stuble that is in the dry lot mostly mud area she has been in.
Mare’s owner was basically told to bring the mare in to the clinic because they did not give colostrum outside of the clinic because her milk wasn’t in yet. They also are not giving her the medication for the milk to come in now at the clinic until after the foal comes.
Today the mare seems to be forming a udder now (seems more there than it was yesterday) but still no milk etc.
So two questions… is it normal for a vet to not let you have colostrum unless you are at the clinic to foal? and is it possible the mare can still have fescue poisoning that is this alarming?
IMHO the vet is being irresponsible by not getting the mare on Equidone. There is far more to the fescue issue than just milk, issues which Equidone can all but eliminate - thickened placenta, prolonged gestation, and more.
Udders start growing long before there is any real milk being produced, and the typical mare has an udder growing for weeks before the is any milk to be expressed.
The vet sounds very inexperienced with reproduction.