At first it was hard to tell from the poor quality what the white puffy thing was (I thought maybe it was some sort of gigantic toy or something,) but by the way it appears to run away at :30-:36, it looks like another dog. Two dogs are pulling the poor thing apart, if that’s what it is.
I do not think this is yet a dog fight but yet a training for a future fight. Clearly the owner of this animal is training his puppy up to be a very horrible dog. In the future this dog might be a danger to other animals all due to his owner trying to teach him to act mean. It is cruel.