A. This is a very serious behavior coming from such a young pet and typically refers to resource guarding in your case. I would be working to get under control of sooner than later. Please seek some help from a trainer that specializes in working with aggression cases. I would recommend a program like a BAT (behavior adjustment training) style program. This will give you the confidence and tools to help her work through this issue. Aggression can start for many reasons; genetics, health conditions, or training (or lack thereof ). It is very important to have proper guidance to walk you through showing him appropriate responses. Aggression is not something to be taken lightly and can be corrected or managed, but this is best achieved with help of a highly skilled professional.
Typical training exercises include teaching the dog you are not always going to be taking everything away from him. You can start by teaching him a "trade method" so he learns that you taking something away in turn provides reward. For example, he has a toy he likes. Instead of walking up and taking it away, show him a yummy treat and offer the treat for the toy, so you trade. Then trade back. This teaches him to allow you to have something of his but it is not taken away and good things happen. This sounds simple in principle but I assure you even this simple method can be complex. Depending on the size of your dog and how bad the aggression is, I would exercise extreme caution trying this on your own, hence seeking professional help.
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