How do I get a mini certified as a therapy animal?

[keepersquest]

I have a mini that I've been doing therapy work with for about the past 7 years. She gives pony cart rides to disabled kids, visits rest homes and greets the elderly, including bedside visits. I dress her in costumes and take her "shopping" at tractor supply and farmers markets. I would like to get her certified, basically to show what rescued animals can accomplish if given the chance.