My girl looked really horrid while she was nursing her filly. She lost a lot of weight just before the filly was born (long story), and had a terrible time gaining it back. Her topline was hiddeous - she was really skinny - her backbone stuck up like the edge of a razor.
I changed her over to a higher fat feed (should have had her on it to begin with) along with alfalfa pellets and beet pulp. She has been slowly gaining weight - her biggest improvements began after we power packed her with Panacure. It got rid of her huge belly and her top line is now looking much better.
She still needs a LOT of work, but I've been able to ride her lightly, and lots of trotting in the round pen. Vet is quite pleased with her - all of our horses lost weight this summer due to the heat, but they've pretty well bounced back now that the weather has cooled off. We had the vet out because we thought something was wrong in the herd (but it was just the heat.)
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!