What are your thoughts about puppies wrestling? I take my Jupiter, 5 months, to the dog park (I know many don't like them), and normally we walk around the track and just throw the ball. It wears him out wonderfully, and he really enjoys it. Occasionally, we hang out in the shady area where most of the owners sit, and Jupiter sometimes encounters another puppy--and sometimes they like to wrestle. It seems to be playful, for the most part, but they never seem to know when to stop (or do they?). Basically, it can go on for many minutes. It seems that usually one puppy starts to get tired or sick of it, but the other one doesn't get the message and won't stop. At some point, I usually take Jupiter away, whether he's the one on top or the one who's had enough.
So is this wrestling normal behavior? Does it lead to problems? Is Jupiter too old to wrestle?