Your puppy can't tell you what's wrong with him, so it is up to you, as his caretaker, to notice when he seems to be ill or in some kind of pain. That's why regular grooming sessions are so important. Spending an hour or so brushing, petting, and checking your puppy all over his body gives you the opportunity to find anything that might seem odd. This chapter will review the common health concerns of puppies and dogs based on certain parts of the body or body systems. Should you notice something unusual on your pup, you can reference it here, and then decide whether it's worth bringing to your veterinarian's attention.