Oh! and one other thing. Chi's have such wee paws and teeny little nails that you can actually just use human nail clippers! we do

on the cats & the dogs.
When I got him Bijou was bad! he would howl.. now he just lays there and lets us do it.
Have you tried wrapping him in a blanket or towel? sometimes that can help calm them a bit, but make sure he can still see/breathe & hear you! years ago I used to go to a certain grooming salon with my poodle and I saw them wrapping a dogs head in a towel one day.. that freaked me out, I thought it was barbaric never did go back there.