@Terri429 There is no place or checkbox to say that you will accept one, two or 10 pets. I have it in the first paragraph of my listing description that I will accept 2 pets and the amount of the pet fee. Be advised that AirBnB will not show the Pet fee as a separate line item; they roll it into the nightly rate, causing that fee to increase -- which you then may have to explain to the guest.
Pet friendly, $75 for up to 2 dogs per visit. Please add your pet before booking.