I personally would not purchase a Chi that will only be 3 pounds mostly because of health issues. Chi's have a predisposed tendancy to have luxating patellas (bad knees essentially)bad teeth, heart problems and more. All dogs have some kind of possible future health issue, but you are definitely raising your chances by purchasing a pup that will only be 3 pounds. My Chi pup is 4 pounds and probably won't grow much more and my adult Chi is 5 pounds and even she seems tiny because her bones are SO small compared to the puppy's bone structure. Also think about things like, Is the pup going to be around children? Kids, even well meaning ones can very easily kill or injure a small dog in an instant. Also, when your pup decides to jump off the sofa (and it will try) will it injure itself because of it's tiny size and fragility. A 4 or 5 pound dog is still a TINY dog, and it will probably have fewer problems, whether they are degenerative defects or not. JMO tho, good luck and keep us posted!