While most people tend to think of dogs with a thick undercoat in terms of large breeds like American Eskimo and Alaskan Malamutes, many smaller breeds also have a thick undercoat designed to keep them warm and dry. When you have a dog with a thick undercoat, grooming him takes on a whole new dimension. Yet, if you don't take the time to groom your pup's fur on a regular basis, he could end up with serious mats that need to be cut out. It is important that you learn to brush his coat properly and regularly.
If you were to ask your pup how he felt about having you groom his undercoat, he would probably tell you that he doesn't really care one way or the other. At least, that is, until the mats get so thick that they hurt. Of course, while you are at it, you can check him over for injuries, debris and, of course, fleas.
It can be a lot of hard work keeping your pup's coat and undercoat clean, but when you get to look at the end of it all, your pup is going to look amazing. Best of all, you won't be stuck paying expensive grooming bills. This is a great time for the two of you to spend bonding with each other. Relax, make it fun for both of you and enjoy the whole process.