Look, I know this is going to sound hard for you to hear, Hedwig, but this dog is going to DIE. Whether it be of old age 10 years from now, or being PTS.
If you need to start from square one, then you start from square one. BOND with him again. There's no telling what happened to him in those 3 weeks. He could have been beaten or pulled on by those kids or the owners never bothered to do training routines with him.
You need to start from square 1 again. It's not you're fault, but it ISN'T Bruno's fault, either. Take 2 or 3 days and don't train him, just sit and hang with him. Talk to him.
After that, train him. If he's gonna walk out that door before you, you shut that door and tell him no before he's out.
It takes effort and companionship to raise a dog.
If you need to start from square one, then you start from square one. BOND with him again. There's no telling what happened to him in those 3 weeks. He could have been beaten or pulled on by those kids or the owners never bothered to do training routines with him.
You need to start from square 1 again. It's not you're fault, but it ISN'T Bruno's fault, either. Take 2 or 3 days and don't train him, just sit and hang with him. Talk to him.
After that, train him. If he's gonna walk out that door before you, you shut that door and tell him no before he's out.
It takes effort and companionship to raise a dog.