Hi everyone! I have a 3 yrs old yellow lab that we rescued last summer. When we got him he was neutered at the shelter and thus had lots of energy to play with dogs and even us. I've noticed the last little while he will go to the park but he won't play with the other dogs. They want to play with him, they will go after his face but he won't do anything. When I mentioned that I had a frisbee but he won't play with it, he will only play with balls and will stop fairly soon, they looked at me and said does he not have toys at home. He does but doesnt play with them. How do I increase his energy and desire to play with other dogs. Thanks!