Nothing tends to make people more squeamish than discussion of parasites - especially the kind that live in the GI tract. But dogs often pick up these pesky invaders from the environment. And, left untreated, your pup can end up severely ill. You CAN find dog dewormers available over-the-counter, but you need to think carefully about reaching for them. We'll go over everything you need to know about these parasites and how to get rid of them.