Mini Fox Terrier Becomes Aggressive
My mini foxie Boofy is 6 years old and has not been desexed. He was living with two other mini foxies Gizmo and Molly in a 10 x 8 metre yard purposely built for them. Gizmo is 9.5 years old, not desexed and Molly Boofy’s litter sister is desexed. They have all been getting along until now. Boofy attacked Gizmo and Gizmo had to be rushed to the vets. Gizmo got separated from the yard. The other day my partner had some Kelpie pups that he brought home. We decided we’d put them in with Molly and Boofy since the pups were bigger than them. Later that day Boofy had one of them pinned down to the ground yelping. We took the pups out. Then I was woken up at 4am to the sounds of Boofy attacking his sister Molly. I just don’t understand this sudden change in behaviour. Please help!