Oops-sorry-forgot to answer the question-With as many aggressive dogs that we have dealt with over the years, I would never feed kibbles and bits to any of them. If you want to try the low protein route, choose something with less chemicals, dyes etc. If you dog is not already altered, do so. The number one thing I have found that cuts down on aggression is altering. If you dog has not been tested for Lyme disease since developing the aggression, test him also. Lyme has caused dogs to have aggression issues in the past according to some people.
