I would look at teaching him control when he's around the ball.
If it were me, I'd be taking the ball and putting it away and only taking it out when I was doing training with him. I'd be doing lots of short training sessions each day where I used the ball as a reward, so he had to work for it.
When a dog is obsessive like that you need to put the control back in and teach them that they get the ball on your terms and your terms only.
If it were me, I'd be taking the ball and putting it away and only taking it out when I was doing training with him. I'd be doing lots of short training sessions each day where I used the ball as a reward, so he had to work for it.
When a dog is obsessive like that you need to put the control back in and teach them that they get the ball on your terms and your terms only.