People are often allergic to animals...does it go the other way around?

It has come up often in conversation, the question of whether pets can be allergic to people like people can be allergic to pets. After having considered that people are either allergic to saliva and/or feces, the probability of a pet reacting to a person is minimal since people don't usually spread their saliva by oral bathing and/or leave their feces in random places unlike many animals. So even if an animal is allergic to humans, it is unlikely that we would ever find out.

That's the thought for the day.