I have the exact same problem with Louie! It has also been since about Oct. He is 3.5yr healthy male, he was tame, perhaps even socialized before his season kicked in. I am so heartbroken that he has not returned to normal yet. I'm beginning to think his aggressiveness is now permanent. He sent me to the er for 10 staples back in Feb. but I still try to handle him. It's so weird that sometimes if I'm holding him, he's okay but as soon as he climbs down, he puffs up and looks at me like I must be someone different that the person who was just petting him! It's insane! I wish I knew what to do so that I could tell you, but I'm also dealing with the same problem!