I agree. We only have two dogs, shelter dogs, and the first few months were a little rough with determining order. I think the big thing is making sure it doesn't get too rough and you are the top dog. When we brought the second dog into our house, we actually brought her sister too but the sister was clearly not good with other animals, especially her litter mate, but you will definitely know the difference between normal dominance stuff and a big problem when you see it.