Almost every day it is the same old thing. My neighbors German Shepard (Hugo) comes over to play and things get rough and my dog ends up chasing my neighbors dog home with his tail between his legs.....This has been going on for 2 years. We were lucky Hugo was only about 10 weeks old when he was introduced to my dog Kadon, so he has never figured out who is boss.. it is pretty comical because of the size difference.
We've got 6x 9 week old Kelpie pups at the moment, and they're still playing sardines in the kennel:
They're going to be a decent size when they finish growing; the dam (our dog) is 20kg, but the sire is about 25kg and a bit heavier set - this lot all have the dam's colours, but they look like they're going to have the sire's build.