I rescued a horse 2 weeks ago. She had hooves that had 3 inches of overgrown hoof. She had one shoe on when she was gotten out of the pasture that she had basically been abandoned in. She has had no feed for over 3 years. She is gaining wieght now, her hooves have been trimmed. She has a limp on leg that had the worst hoof and shoe. The man where I have her boarded says that it is a bruised frog...how long does that take to heal? Can someone give me advice?