I hate that Pitbulls have become "black listed" in a way. The fighting dogs are TRAINED to act that way. If we treat them well, Pitbulls are an amazing and sweet breed of dog. My baby boy is wonderful & hes a pitbull!
I see it could be two ways. One: the big dog is very kind and left the big bed for the pup. Two: the pup went on the big bed and left the small bed for the big dog. In that case, if I was the big dog, I would just lay on the small dog (or around it).