The other dog is barking and biting the neck, well the skin around the neck because of the loose skin. Leo doesn't bark at other dogs. I don't want him to become fearful of other dogs in the future if he has a bad exp with this one. When ever we go to the dog park or park, he is really well mannered and plays well with other dogs. But this particular pup is more of a biter and barker than most other dogs he has met.