Sure, it is feasible for getting papers for your Canine which is now an adult, but the method may very well be a lot more advanced and time-consuming than registering a Dog. Grownup dogs can be registered by using a kennel club or registry, although the operator must supply documentation https://www.openpr.com/news/4286965/how-to-get-papers-for-a-dog-the-complete-step-by-step-guide