Well I am no expert whatsoever but classes couldn't hurt anyhow right? Cutty and Miila can both be vocal at times but r not aggressive. Like Cutty will grumble as we call it, when I bust him for say eating my 1 year olds food and send him out of the kitchen. He started with aggression issues when he was just over a year. I didn't have this forum for the great advice I got with Miila so didn't handle it the way I should have I am sure. Thankfully getting him neutered changed him back almost 99% I would say. He will still grumble from time to time but never bite or anything. He is all show and does listen with that teenaged asking back attitude. Miila every once in a while will act like she wants to growl over me telling her what to do and I submit her instantly. I think for her it is a little reminder she needs of where he is in the pack. I think going thru Miilas aggression when she came here has me more on top of her for any slip up. I know what she can revert to and that is not an option, so that's why I submit for the drop of anything if I need to. Still something I only have to do once every few months if that.