They have different kinds of muzzles for different kinds of dogs, so I'm going to assume yes. Take him to Pet Smart & try some on. Since he doesn't bark there is no need to get the kind that will keep his mouth closed... But it might be the cheapest muzzle. He doesn't need anything fancy as hes not an aggressive dog, but comfort is important too. You don't want him getting nose sores from it rubbing him to harshly.

Have you seen the big stuffy Digi has on her bed? Its bigger then her LOL she loves to cuddle up to it. Maybe a big stuffy friend would help comfort him?