I have a 5 year old coonhound that I adopted in December. He was immensely pampered in his old home, and I have been able to get a lot of basic obedience training instilled since. But unless I have food in my hand, he typically ignores me when I command him to come. It's particulary concerning when he goes to run trails with me. I prefer to have him off leash because he can run at his own pace, but I really need him to listen when I call him back for safety. He knows the command and responds great on a training lead but when it really counts, he brushes me off. Any suggestions on how to work with him?