She's not a train wreck. She's just skinny. I think you made a good trade, you have the time, patience and know how to turn this gal around. Not a doubt in my mind that by this fall she'll look like a completely different horse.
She seems to have a decent confo, nothing obviously wrong that's screaming what the heck have you traded for.
She has the kindest face and eye, you know walkers...They can be some of the sweetest things on earth. I'm sure with more groceries she'll get more pep but I don't think she'll do a Jekyll/Hyde flip on ya.