I am not certain what you mean by "common issues" but if it is regarding particular problems associated with that breed of puppy there really are none except for the problems associated with many miniature breeds. Your puppy would have been examined by a veterinarian maybe even a couple times before you got him so some of the possible problems should have been eliminated. There are videos explaining some of the possible abnormalities of many breeds, take a look and if you have specific questions you can send them through the forum, chat or INSTAVET mobile app.