I agree with your vet that neutering Moto (at the right age) will help. It won't solve all of your problems, but it will help.
We have had similar challenges with my two boys. The younger one is asserting himself and goes after food, toys, and beds. I have to closely supervise especially mealtimes. The younger one is responding very well to me simply saying "No! That is Max's bowl (or toy, or bed)." |