Sorry to hear that Candy is having to go through this. Hope it works out to her benefit.

Are the laws regarding biting incidents more stringent in Canada than they are in America?

In the majority of cases here, a single biting incident would not be a reason for a dog to be put down. A couple of weeks in quarantine, payment of a fine, and a promise of better control and supervision of the dog in the future and it would be done with. A severe bite, attack or repeat incident could lead to what poor Candy is going through now.