I had an idea for a secondary weapon and for this to be the model for it, because it would be perfect.

You could hold it in your hands and then toss it forward (not a massive throw or anything) to a health or ammo pack, and then it would bring the health or ammo pack back to you, and then you could throw him again. I think the dog should have a team colored collar so you can tell what team the dog is on. The enemy cannot affect the dog at all, how ever if the dog rams into an enemy, it will push the enemy sideways. If the dog bumps into a wall or goes towards a hazard before it can reach a health or ammo pack, it will run back towards the scout. Also, when i say health or ammo pack, I mean ANY health or ammo pack including sandvichs. If your wondering how the dog brings it back, well it carrys it with it's mouth of course!

It isnt supposed to be a serious weapon, but it would have it's uses, and it's cute as heck.