Aggressive towards my boyfriend
My GSD (Grizzly), who is a little over a year old, is starting to show extreme aggression towards my boyfriend of 3 years. Both my boyfriend and I had him since he was 6 weeks, and he was great until suddenly within the past few weeks. He's a great dog when it's just me, but he seems to get overly jealous when my boyfriend hugs me after coming home from work. Simple things like holding hands or being close, and Grizzly just starts barking and lunging. Also, when I'm in camp and it's just my boyfriend and Grizzly, they're fine. Grizzly doesn't get aggressive, but as soon as I come home, it's like he turns into a different dog and just hates my boyfriend. He isn't nurtured, so I think that might be an issue. Tonight he came into our bedroom, and literally just walked over to my boyfriend and bit him. Not hard, but enough for my boyfriend to jerk away which then caused him to bite more, so I had to kick him out of our room. Any other ideas about what else is going on with him?