John has learned a little about cats. For those who may come across this ... Cats are wonderful pets. But those darned allergies ... You might not realize their in the room until you start sneezing.
If you have an allergic reaction, it won't be comforting to know that there are more cat owners than dog owners.
And, cat ownership is not one of those statistics we normally track. However, you can avoid sellers who might not disclose there has been a history of cats. You might ask property management companies if anyone is selling a home where pets were not allowed. Covenants (for HOA neighborhoods) can exclude pets. I'm not aware of any.