My dog (G. Retriever) is 14 going 15 y.o. In all his life he never really barked but he started about one year ago. At the beginning it was for some easy identifiable reason, he had no more water or he wanted to go out to pee ... But lately it's almost all day long and even in the middle of the night. It's not easy for us and I'm afraid that the neighbors may soon start to complain.

What to do ? Does anybody have the experience of this kind of change of behavior and how to correct it ?