As a caring and compassionate yorkie breeder who occasionally offers yorkie puppies for sale, I would like to offer advice on the use of a harness for your yorkie. It is very important that when you are walking your yorkie on a leash that you utilize a harness instead of a collar. It is well known that collar use with a leash can cause many problems to yorkies and small breed dogs. One problem in particular is tracheal collapse. If you are walking your dog with a collar attached to a leash and the dog continually gets ahead of you this pulls on the leash and puts stress on the collar, which in turn puts stress on his/her neck. This repetitive action can cause problems within the neck structures. Utilizing a harness will help prevent any stress on your yorkie’s neck. A harness is also better to use as if you must pull your dog back quickly, as a harness gives better support. There are many types of harnesses available for you yorkie. I suggest you take your yorkie with you to your local pet store and try the various harnesses on to see which one offers the best fit. Once your yorkie is correctly fitted for his harness, your puppy will enjoy his outings with you and be filled with curiosity at his new surroundings. Happy Walking!