I bought a mini mare in December from an auction, she was big then. In march she foaled, I had the vet check her & the foal over the day she foaled and all was OK. Since foaling her weight has ballooned to where she looks bigger now than before she foaled. I'm not feeding any grain, but she is on pasture with access to hay as the grazing is poor. I'm at a loss as to what to do as she is looking absolutely obese and this can't be good for her. She's not getting any exercise as she is nursing and the foal tends to panic when you separate them. I have wormed her 3 weeks ago. Any advice would be greatly appreciated.