I have a 2 year old male Staffordshire Bull Terrier who is a softie. He gets on great with almost all other dogs apart from French Bulldogs. When he sees Frenchies, the hair on his back bristles and he becomes tense. He had a couple of bad interactions with Frenchies whilst he was a pup and he’s never seemed to forget them. My girlfriend recently bought a female Beagle puppy. Yesterday, she brought her to my house to be introduced to Buster. She was quite intimidated by Buster’s excitement; he was jumping around the room and crying to be allowed close to the pup. After ten minutes or so, we brought them closer. I held buster in my arms and my girlfriend had hold of the pup. He sniffed and licked her lots. We sat in the same room for a while and then put the two dogs on the floor. Buster was sniffing her again and then he pinned her. I immediately grabbed Buster and picked him up. My girlfriend grabbed the pup and left the room. We separated them again and afterwards allowed them back in the same room again with Buster on the lead. He was allowed close to the pup but not within touching distance. He showed no signs of aggression, his tail was wagging and he continued to try and sniff her. Whilst he pinned her, he didn’t show his teeth or growl or bark. He has done this in the past in retaliation to dogs who have became aggressive but he usually just ignores such behaviour. He was chased over a nearby field recently by a snarling Cockapoo of all dogs, which goes some way to give an indication of his character and temperament. Should we be worried about him pinning her and what do we do next?