So my dog has a red pimple or blister thing on his side & it was small at first & it grew a little bit? IDK what it is or what to do.
Could be any number of things .. infection, bug or spider bite ... who knows? The only way to deal with something like that is get a vet's opinion.
That happens, it might be a simple growth might be something more. I would take your pup to a vet just to check on it.