I started using W/C about a month ago on a little gelding, he is not fat, has never been fat, but he is only 29" tall and a GELDING, (I think their metabolisms get slow upon gelding, might be my imagination, but it seems to go that way) I thought I'd be proactive so he doesn't become a chubby. OK, it IS a diet food, looks like a diet food and I think it tastes like a diet food, because initially he looked at me like "you've got to be kidding, where is my REAL food??" So I've just been feeding him 1/2 W/C and 1/2 normal sweet feed just to keep the calories a little lower and keep him in better shape.