My beautiful Della a 1.5yr amstaff x I've had since 8 weeks is beginning to display some alarmingly aggressive behaviour.
She was basically a rescue, coming from a backyard breeder with absolutely no idea! The bitch was struggling to keep all the 11 pups fed resulting in about half the litter being seriously undernourished. Instead of supplementing with a milk replacement they were feeding the undernourished pups scrambled eggs. At a few days old Della was accidentally "stepped on" by the mother causing a rather large wound on her back, the breeders failed to seek vet attention or advice and the wound was left to heal open. The enclosure the pups were kept in was a squalid mess of dirt, urine and faeces. I brought Della straight from the breeder to the vet where she stayed for 3 days. She was suffering from staph, worms, fleas and Coccidia. In short Della had a very rough start!
Despite her beginnings Della is a very sweet playful dog and has recovered from her ailments completely.... (apart from the decent sized "stepping" scar on her back) Della lives with 3 other dogs who all get along relatively well until the last few months.
She has taken a particular dislike for one of her mates in particular a desexed male amstaff x. They can play together just fine occasionally getting into arguments that he usually wins. Around their kennel however and inside with us is a different story. She won't let him come near her and if she goes near him he's not allowed to move or she'll growl and snap but without really biting. My partner and I are growing pretty tired of that behaviour as we don't like having to keep them separate and we can't understand why she's playing with him one minute and attacking him the next!
And then today.......... Della is currently recovering after a a backyard injury resulted in a trip to the vet and some stitches and has been kept inside for 3 days. Today i left her asleep on her mat to get something from my car and I left the door open, the neighbour had her little dog outside with her when Della came bounding out. She leapt on this little dog as it was yelping its face off, I thought it was a goner Della had her mouth around its neck and looked as though she was attacking it! We got them separated and the little dog did not have a mark on it apart from some dog drool on its neck. This little dog has occasionally barked at Della from behind the safety of its screen door and Della at first acted aggressively but eventually got used to it!
I have no idea where this aggression has suddenly come from and also why she would seemingly attack another dog to this extent without actually biting it! Has anyone seen this type of behaviour before? attacking seemingly viciously without actually biting. Is it a precursor to a more serious attack? What can be done about it?