Hello @Marilee12
Yes pet fees and any additional fees have to be clearly stated when guests make a search and click on a listing.
The quickest way I think for you to find out what your competitors are charging is to make a search for your area and in the filters, tick the pet option so that you only get to see listings that welcome pets.
Airbnb have recently introduced a pet fee where hosts can indicate if its per stay, per pet, per night etc. Before you only had the option to use the per stay fee.
Good luck!
Joëlle