Profile etiquette (repeated requests for dogs I can't book)?

Hi! I have an indoor cat, who is listed in my info and specifically mention him in my profile. Yet I keep getting requests to sit dogs who are marked as not being cat-friendly, or who have none of that information filled out (and when I ask, the owners usually say the dog is "alright" or "okay" around cats.... not the most confidence-inspiring). I've been replying with things like "Buster looks like a sweetie, but I have a cat, sorry!" and it's been fine so far. But I'd like to avoid these altogether so as not to effect my booking score (I do provide the info up front, after all). My question is: Is it rude to flat-out state in my "About" section that I will decline booking dogs who are unfriendly/untested around cats? Thanks!