My dog is one and three months, and hasn’t been ill so far ( touch wood!) but yesterday and today he keeps sneezing and his nose is running.. I think he has a cold - what should I do to treat him? Is it vital to take him to the vet or is it possible to treat him at home? I’ve checked on the internet but they don’t seem to answer exactly what I’m asking .. please help!! X also , will it be contagious to us? My brother is small and I don’t want him getting ill