All of our broodmares are also riding/show horses, and when the foal is weaned they go back to work and show until the next ‘maternity leave’. I’ve ridden mares with foals at heel, and it is a PAIN as foals tend to want to run/jump/play on/around mom! I suppose if you’re just futzing around it is one thing, but it is hard to focus on executing a good counter-canter or half-pass–much less juump a course!–while maintaining preparedness for evasive action…
I’ve also had a petite mare who looked HORRID when her foal was only two months old–she was fat and slick when she foaled-- the vet thought the foal (judging by her size and condition) was six months old and, after seeing what I was feeding the mare–unlimited good quality hay, three large grain meals, beet pulp, calorie supplements, and not wanting to add alfalfa b/c he was leary of doing that with such a ‘growthy’ foal–vet recommended weaning as soon as possible.
Mare’s milk has little value after two months, and by the time our foals are three months old their moms are THOROUGHLY sick of them… the foals are eating plenty of hay and grain and spend very little time with mom by then, they spend some time in separate stalls, etc. Weaning at 4 months is pretty anticlimactic.
Jennifer