My husband is allergic to cats. He's one of those people that when you do the patch tests on their skin, he's allergic to EVERYTHING. When we first got together (27 years ago) he used to get terrible attacks. He went to an allergist ages ago and started on the shots - he's fine. We've had cats for at least 20 of the 27 years; no problem. The shots are painless and he'll get to a point where he only gets them once every several weeks. He may even find out there's something else he's reacting to when they test him - allergists are the best option!