How do I get my dog cerfied as a service dog

I believe St. John ambulance does that in Canada. In the US, there is a site usatherapydogs.org that outlines some things, plus the AKC has a page with a long list of organisations that handle this ...

http://www.akc.org/events/title-recognition-program/therapy/organizations/

I've thought of doing this with my shelties also. Good luck.