If you’ve got a mare due to foal, you’ll want to know how far out from foaling do mares start making a bag, as well as all the other signs of labor in horses.
When a mare waxes up, a waxy secretion builds up on the teats. This is fairly easy to spot and is very helpful if you are not sure when your mare is going to foal.
How far out from foaling do mares start making a bag can vary from mare to mare, but it is normally between two and four weeks before foaling. Maiden mares tend to bag up much closer to foaling than more experienced mares.