How long does it take to put weight on? (Pic overload)

I brightened this picture up a bit just to show you how he looks now. He could still use some pounds, but I guess I'm not too worried since he is a standardbred. One man at my barn who knew him when he was a pacer said that he has never looked as good as he does now. He said that he was extremely underweight when he raced.. Poor boy.

He looks like he needs muscle as much as fat. I agree light excercise will do him lots of good. Right now it looks like he has a belly, just no covering on his ribs, hips, or spine. Muscle gain will help that.

I don't really know how to help him gain muscle as I'm kind of new to having a horse haha. But I can't ride him right now because he's been on light exercise for the past 6 weeks due to a hoof injury.

Every horse that is new--whether just purchased or brought in--gets the pro pack wormer--5 days of treatment--period. Gets em clean and takes away the possibility of worms. Then on to a regular worming schedule--proper rotation for the area etc.

Beet Pulp works for sure--remember to soak it first. Feed at least twice a day.