Your pet is appeared to have developed possessive or protective aggression. So, first step is avoiding all aggressive triggers and then setting up a behaviour modification plan with qualified behaviour specialist. A combination of controlled exercise, increased pet parents control, pet obedience to commands, and behaviour modification usually resolves the problem. For example, you may use two toys to fetch so that when the dog returns with one item, you can show the dog the other toy. This usually results in the dog dropping the first item and becoming ready to chase the second one, allowing the game to continue under your control. You may try taking away his toys and that makes him nothing to guard. You may be able to start
Question by - Apurva Nair, Thane