I would just like to state that YES , a yorkie can make a wonderful CERTIFIED SERVICE DOG . As some of you on our forum may well know, Yoda is a certified service dog. He is not just a pet to me. No he does not "lead around the blind" .....he infact detects my seziures. He goes everywhere with me, without him my life would be very restricted. Along with his abilities to detect seizures came ALOT of traing, hence the title (well deserved ) CERTIFIED SERVICE DOG. There is alot to be said for all that he does for me. I do get stopped quite often by all different sorts of people, some rude, some just curious. To the rude ones I just show them his ID Badge and tell them to have a nice day. For those others that are extremely nice, I pass on to them a lifes lesson....no matter your size, there is always something that you can do to makes someones life so wonderful