Ginette:
Your posting regarding Canada had me curious...
It appears that the law varies from province to province...but I am also aware of international service dog rules as well as my best friend is blind and uses a service dog.
Here is a link I found. I would probably suggest contacting a disabilities lawyer who is familiar with the law...they'd be better able to steer you in the right direction.
http://www.rootsweb.ancestry.com/~cascgs/htm/Canada.htm