im quite positive its purposley biting into him... he bites and nips me like normal puppy play but when it comes to my son its like a full on attack. its only happend 3 times, he also does regular puppy biting with my son, but these 3 other times were proper attacks for no reason. but still thats too many for my liking.
its hard cause my boy is screaming with bleeding cuts, so first thing i do is get him off my son. i immediately use a very stern voice and put him in a timeout area.