My new dog, Sky, a staffie, aged 6, has been with me 4 months now. When I first got her, she wouldn’t go run after a ball at all. And then after playing football with a tennis ball to get her interested in the ball and then kicking it a distance away, she would run after it, Now she will chase a ball all day.
It also took a while to build her fitness. A first best I could do was 3 throws before she was limping. Now quite happy with 20 + long throws in the park with one of those ball thrower things. She has lost a kilo too. Vet was dead proud of her today 8)