I have a grooming questions about our 8 week old Lhasa Apso / Shih Tzu? He is pretty fuzzy. How often in general should he be groomed? Also, I heard from several people about how his rear end should be groomed. Some people said to make sure that he doesn't have a lot of hair around his butt, because poop gets stuck in there and can cause problems. What about safety? I also thought that there should be some hair there to protect him? Any advice on the subject would be greatly appreciated.

I would go over him with a soft bristled brush daily. If the dried poop accumulates won't come out, try sponging it off. I wouldn't go to trimming the hair until you had too.