Look at Petmart.com
http://www.petsmart.com/global/produ...N=2025643&Ne=2
for Gentle Leader. It changed Sebastian instantly!! I would be a little scared of a choke Collar i have heard/read yorkies are prone to collasped treachea's. Something that is being tugged around their throat could be a problem.
Good Luck!! Let me know who it goes Ü