Hello I've got a 4 year old male Hermann just recently he's started to get a but aggressive, I've noticed he starts to run (and I mean run) towards my hand when I put his food in his house. I left my finger there to see what he'd actually do if he caught it and he went to bite me! He's also started to get his private parts out a lot more! It's grown a huge amount to what it was a few months ago! It scared me the first time it came out!! Could he be getting aggressive because he's reached a certain age? I've never seen him like this he's normally really laid back! Thank you in advance x