Your vet should never be afraid of your dog. So one, get a new vet. Two, your Bullmastiff is showing signs of food/possession aggression. What you need to do is to find a positive reinforcement trainer as soon as possible to stop the behavior before it gets worse. A growl is a warning before a bite. If you feel confident on working with your dog alone, look up Dr. Yin's low-stress handling website and watch her video's on working with dogs with food/possession aggression using counter-conditioning.
Answered by Anonymous - 5/1/2014 12:21:35 AM