Trevor is a Morkie, my first experience with a Yorkie mix, first experience with a male anything......then came Harry who was not treated nicely where he came from.....at first, they got along great! Brothers!!! I got Trevor neutered, and Harry is scheduled. Long story short....out of the blue...Trevor hates Harry. He growls, he bites, he takes away everything Harry wants. Listening to Cesar....when I see this behavior, I put Trevor on his back, make him understand I am alpha....but the behavior continues....any advice? Harry is very sweet, docile. He runs to me to pick him up when Trev gets into one of his moods....am i enabeling the behavior?