How do I get my dog cerfied as a service dog

If you're getting him as a companion, check with your doctor to write a letter proving you have a problem with whatever it is, and the dog makes your life better. Do not use the websites that you pay for a certification, they're a bunch of spam and not legal.

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.

That depends on what sort of service dog you want him to be. A seeing eye dog obviously takes a lot of training, but something like an emotional support dog would probably just need proof that he's a calming influence upon you.

Talk to your doctor some of them will sign off on an emotional support dog

You give up your dog to trained professionals

Google it