Can you take a close look of the bump on Pearl's back, about where the back of the saddle would be? I tried looking it up and found something called "hunter's back" and that a bump like that can be caused by an ill fitting saddle, which would be the more likely conclusion. Do you have any knowledge or experience about that? Most of what I was reading said that their horse had no pain from it. I have pressed down with my hands and she doesn't react.What a transformation for the chestnut gelding! So shiny and plump! From the pictures of Pearl, she's very thin but, interestingly, her feet don't look bad for a neglected horse.