My working lab is nearly 16 months. We've been very careful with his exercise, stairs , adhering as much as possible to the 5 min rule, etc But recently he has been chasing a tennis ball thrown from a ball launcher for the whole of his first off lead walk of he day ( about an hour). He absolutely gallops after it and skids , turns, and flips in his effort to catch it. I've begun feeling uncomfortable about it and the effect on his hips. Although we took all precautions ie hip scores of both parents, and all the things mentioned above I'm wondering if this is bad for him, but he loves it SOOOO much that he would feel very hard done by if I withdrew the ball.
Is this bad for his hips or am I just being a worry wort for no reason .....?