I had this happen to me from someone who is no longer breeding but was fairly well known. I purchased four horses from them based upon pictures that i later found out were heavily doctored.(these horses were by far not cheap) When i got down there, she showed me her horses. All were really thin. She said she wanted to keep them on the thin side so that they would not get sick.
That she had bought and lost several mares because they arrived so fat, that when they started to loose weight they came down with that liver disease.
Then she shows me the horses I bought. Non of them had much weight on them. Their feet were like skis, none looked at all like the pictures (as a matter of fact, when I got the papers and saw the pictures she had on the papers. I know I would have never bought them if I had seen those pictures to begin with. Needless to say I was shocked.)
The barn had only one entrance, the other entrance was piled high with old dry moldy hay that she was feeding them
The barn had almost no windows, so dark inside one could hardly see anything in the middle of the day. Foals and their moms were in these dark, dirty stalls. No signs of any kind of grain.
My first thought was. I wish I could get my money back, but that was never going to happen. I did not turn her in. I did end up fattening up the horses and reselling all but one (lost my shirt on them). The one I kept was so wild, so skinny and her feet where so long that they curved up. It took me quite a while to gain her trust and fatten her up. But, since she had been through so much, she will stay here. one of the others was sold to a friend who just loves him.
I am not sure what I would do today, but I am sure glad that this farm is no longer in horses.