That combination caught my eye. I have a boxer named hannah ( well over 13o pounds ) and my daughter has a hermit crab that hannah wants to play with. Now remember hannah is 130 pounds and has almost knocked me out literally and i am 6ft plus and 235. Hannah gets a hold of the hermit crabs little pen and knocks it to the floor and the crab gets out. I come through my front door to see my dog running away from this crab. We have hard wood floors and a dog trying to run on the hard wood goes nowhere fast, just slips. It was funny as this big dog is fearing and running or trying to run from a little hermit crab.