Yes, it is feasible to get papers for a Puppy that is previously an adult, but the process may very well be additional complicated and time-consuming than registering a Puppy dog. Adult canines is usually registered by using a kennel club or registry, even so the owner should supply documentation https://www.openpr.com/news/4286965/how-to-get-papers-for-a-dog-the-complete-step-by-step-guide