Choose up to a certain number of pets

I’d love to be able to filter ‘up to # of a type of pet.’ I’m only one person, and I’d feel more comfortable looking for sits that only have up to one dog, and up to three total pets.

Example: Click ‘Filter’, Click ‘Dogs’. There’s an option that now appears which defaults to “>=1” (one or more) but I can set it to “==1” (exactly 1) or “>=3” (at least 3) or something like that.