Diesel has been acting differently for a couple of months now. When he was growing up he was always around other dogs. My roommate had 2 husky's he played with along with all of my neighbors dogs. He never showed this kind of behavior until I moved back home. He has never acted aggressive before, bit a dog or person, or even showed teeth. He's about a year and 3 month old now. When I take him outside now and if he sees another person he will start to bark and his fur will stand up. He never growls, just has a deep bark. Whenever he sees another dog now, he will do the same thing and try to go towards them. I really don't think he means to be aggressive, I think he's just protective. About 5 months ago he stayed with my friend who had 2 other dogs and after about 3 mins of meeting the other dog all he wanted to do was play. I just need some opinions on this or if anybody has any advice that would be awesome :] thank you!