Had my 3 year old male since he was 6 weeks old.. He is very hyper, very happy. Last year before he got neutered, he began growling at me whenever I said " no!" . I will admit I gave him a spank on the butt when he did this. Well now, whenever my boyfriend is home ( his dog too) he lunges at me for no reason at all. He does not do this generally when he's not home. We have gotten a trainer, no luck. Tried exhausting him, no luck. Tried herbal relaxation, no luck. At my wits end I miss my happy cuddle boy :( I know it's most likely fear related or anxiety related aggression but I need to know how to fix this!