[HisNameIsHarley]

You should never walk a small dog that pulls by it's collar. Especially a yorkie since the breed is known for sometimes carrying the a gene for collapsed tracheas. Pressure from a collar can only enhance damage to their little bitty throats. This is what I did with Harley. If you walk him with his collar he gags and chokes himself until he vomits. No good. If you walk him with his harness he pulls and pulls like a husky until he's exhausted and my arms are sore. No good. So, I tried the face halti. OMG. I don't know if this will work with every dog but it sure has been a God send for me. I bought it from petsmart and now I have the best little behaved boy at my side at all times. If he does begin to pull the strap around his muzzle tightens a little so when he relaxes and comes back to my side it's loose and comfortable (It does not hurt him at all). He even helps me put it on now! If he doesn't do better on the harness I would check the halti out. Also, I had professional help from my trainer at work to help me get it right and to use it correctly. So ask lots of questions!