Dog has green snot

I adopted this puppy from a shelter on Sunday. They told me he has worms and gave me meds for them. But that is all they told me that was wrong with him

Today he started having this thick green snot come out of his nose

I’ve literally never seen dogs have snot like this before!!!! Is this just some sort of cold like humans get some times???? Is that even a thing??? Should I be concerned for him??