Worms of various kinds are a common health problem for dogs, and puppies in particular. Owners should be on the lookout for roundworms, hookworms, heartworms and tapeworms. That said, worms can be hard to detect. You may be able to see them in your puppy’s dookie, but most likely not. Symptoms can vary, but may include diarrhea, vomiting, low energy, appetite loss and a round, bloated belly in puppies. If you suspect your puppy has worms, bring it to the vet. The good news is that worms are easy to treat and get rid of. A newly adopted puppy should always be checked and treated for worms in any case.