Snowy and Horatio have been bonded for nearly three months now. Just recently I've noticed Horatio has become more aggressive to Snowy and started chasing her a bit but then he'd start grooming her again. Tonight he was grunting and chasing her. Should I be worried? He wasn't his usual self towards me too. I've checked him and over and he seems physically fine. What is causing this new aggression? Could it be that he's trying to be dominant one as he used to be the submissive one?