Bosco is a 4 year old mini labradoodle who weighs 33 lbs. Regarding the summer time care mentioned above: we live on a golf course and when I walk Bosco on the cart path, I cannot keep him out of the bushes where he ALWAYS retrieves a golf ball. He will then carry it with him the rest of the walk. I'm wondering if that restricts his panting ability and may overheat him? Any opinions?--Dave