B&B with a cat

Hi, I have a B&B in which i live and work renting a couple of rooms of my house.

I just adopted a cat, and i can't find where to write it in my B&B's home page here in booking.

The cat of course is not going to the guests' bedrooms but still going around the common areas (kitchen and livingroom).

Which is the best way to let know that we have a cat, before people will book. I'm expecially warried about people with allergy.

Thankyou for helping!

Luvi