Is it cruel to slightly under-rug an overweight horse? My mare has a very large belly and is quite overweight. She comes in at night, has plenty of soaked hay and a small diet feed. She's clipped out but only has a MW stable rug on overnight, she's not a cold type of horse generally and I'm paranoid about over-rugging but as its been really freezing the last few nights, I keep thinking maybe I should put a thin fleece under her rug? But then to be honest I was thinking that I don't mind if she's a bit chilly (but obviously not shivering cold or anything) as she may lose a bit of weight but does that make me an evil mummy? 