I have a chihuaha pomeranian pug who was always happy go lucky. I got him when he was about one years old. I think he was in an abused home because he was very tired and scared at first then turned into a happy go lucky loving dog. My boyfriend and I broke up and I moved out and took the dogs with me, and now he seems to growl and snap more. When hes tired, when he sees other dogs, when he sees kids. Not something he used to do at all. So it makes me wonder, is it because hes growing up? confused about living situation? Unhappy or ... what would be the reasons? and the best course of action to help fix this issue.