Thor just sleeps all the time and even though he's teething it doesn't seem to be bothering him. If you go to petsmart, they have several hard plastic teething toys but my favorite is the same idea as the frozen washcloths; it's a soft white bone that you soak in water and then freeze, and my baby loves it. Also another good one is to make special ice cubes. Get a meat flavored bullion cube, disolve it, then make ice cubes out of the "juice." it gives puppies something to cold to chew, it tastes great, and won't stain the carpet.