There's something that a dog gets on its muzzle, and I can't think of what it is or if it's breed related or not, but it looks like little pimples. If it spreads or gets worse, I'd say bring him to the vet. Otherwise he should be o.k.
Tira used to get little bumps underneath her chin and we switched her to stainless steel bowls to eat/drink out of. Sometimes dogs can be allergic, or have a reaction to plastic (or other materials) that bowls are made out of.