I kept one of my old horses at a livery yard when i fractured my back, so that they could excersice him. But more often that not he was lame from a kicking, or mud fever that they "found hard to treat" (which it wasnt, all he needed was vasaline on his legs before he went out!) When i went up to see him one day in the middle of the day (unusual as i usually only saw him in the evenings) he hadnt got a rug on, freezing cold day he was stood at the gate, i asked why and they said he had ripped it, they never phoned to inform me to get him a new rug. when i took the rug home and looked at it it had teeth marks, hoof prints all over it! I was quick to make a huge deal out of it, finally he did get a field with just one other, and they seemed to get on better, but they never could get the mud fever sorted! Which i seemed to have no problem treating!