Ok if you want him to stop chasing deer,its simple buy a shocking collar and each and every time he sniff's a deer track barks at a deer etc. fry him(make sure your not touching him lol)...if your fine with him running deer by a tracking system and use it every time you go out when you lose him turn it on and pretty much easy as that...all my dogs that me and dad have ever had were hounds and hunted specifically coon's...i went out the other night and my two current redbones ran a deer didnt find em till the next day....
This is all I know because its all I've ever done someone else I'm sure will have better advise this is just coming from a ol' out in the backwood's down in the hauler kinda boy ya know?