my little callie is allergic to my brothers dog, Lennon(yes, after John Lennon).
five minutes after he licked her, she had a raised rash all over her cheek, her eyes were red and puffy, and she couldn't stop scratching her face.
i ran to the store for some benadryl, which cured it nicely.
the next day i had (more like forced, she doesn't like dogs) Lennon lick her again.... just to see.
and wa-la, another nasty rash.
callie is allergic to dogs!