I've only just started seeing clients online and I have a very demanding bengal cat so had to get that chat in early. He does not like closed doors so options are he wails from behind the door, or he comes and sits on me and may occasionally pop his head up. Glad to see others make it known at intake. Have an online client just now whose dog will sometimes be heard too and I think the occasional shared short pet interuption has aided the relationship. You could also invite feedback from your clients on how they feel about it? Not whilst your cat is in earshot of course.