I've a 5 month old female GSD/golden retriever mix. We got her at 8 weeks and she's always been nervous around people, especially men, and other dogs. I've done basic training classes with her.
Today we were visiting our in-laws and she is nervous of my father-in-law so I've got him to give her treats the few times she's been visiting. She was fine and we were there for about 2 hours. She was asleep when he walked in the door & she growled, showed her teeth & then lunged at him but my husband grabbed her in time.
Everyone got a total shock. She is only 5 months old. What can we do to prevent her being an aggressive dog? Will she grow out of this?
Any advice welcome