Believe me when I say that males are just as territorial as the females. It's been over a year now and Mac and Ming still hiss, growl, and attack Kimba. Kimba is scrappy and doesn't back down, so sometimes the fur flies. Plus, Kimba waits for either one of them to be preoccupied with something else and then he POUNCES! I refuse to lock any of them in the bedroom, so they are just learning how to live together. Fur doesn't fly anywhere near as often as it used to. Now they mostly growl and chase each other. It's a start. Don't be in a hurry for them to get along. Ming is on anxiety meds and it does nothing about the agressiveness he shows to Kimba. Sometimes he is the agressor and sometimes Kimba is, they take turns. As long as no one gets really hurt, you can pretty much leave them alone to sort it out. Pearl has been through some major changes in the household the last couple of years and I think she may be the most sensitive of your cats and this is how she shows it. I wish you luck with this and if you find a way to get them all to get along, share it with me....PLEASE!