I do believe that they feel discomfort. I always find something that they can teeth on such as a teething bone or treat. Also, I give them crushed ice, they love it and it seems to really help them. I have a snow cone maker so I put ice in there and it crushes it real fine so I don't have to worry about them choking on a piece. They also have many teethers at petstores that you can even freeze and then give it to them, and they help as well.
