12 Year old Buckskin Quarter horse gelding

Durango is a dead broke buckskin quarter horse gelding. He stands around 15 hands and is thick and stocky. He is Grade. He is excellent on trails and down the road, in the arena, etc. He's very lazy. Durango could use some work on the ground as he's become pushy and a little disrespectful. He is ridden by beginners and intermediate riders and just plugs along. The previous owners bought him from a ranch outfit so he's been on cows.