My friend who works with the L.C.F. sent me a great link to a great site that answers just about anything someone would want to know about service dogs. matter of fact great info on just about every aspect of anything in a dog's life.

Welcome to www.germanshepherds.com

You have to google it, but well worth it I found. I think you can also get it by googling;

Our Community: P.S.D-Psychiatric Service Dog Information.

It's a GSD site, but it would apply to any dog. I think there are other breeds on there, haven't finished looking through it.