has anyone had their dog play with anything to the point of exhaustion? my chewie got a hold of a plastic ball that lights up and chirps, when he has it it is like he is on crack! he gets all hyped up barks growls runs it down throws it around and in just a few minutes he is panting , tongue hanging out, falling down like a drunk. i had to throw it out cuz he would watch were you put it and bug you to death to get it back. i thought he was gonna have a heart attack, he's only 2 yrs old. also i can't let him outside in warm weather more than 15 minutes cuz he gets over heated easy. gosh he is soo delicate, it is a shame cuz he loves to play. he will fetch a ball as long as you are willing to throw it.