This is my first dog, and we have had no problems at all until now. However, now at night, he starts to bark continuously for fifteen minutes straight every night around the same time, despite there being no other dogs barking. My best bet is that as he is a few days more than a year old, he is entering adolescense, and that it the issue, but I'm not that experienced. In your experience, are dogs ltroublesome around this age? Thanks, I appreciate it.