How do I fire a client?

Nicely tell her that you appreciate her expressing interest in your services, but you are not well matched for her needs. You can follow that up by referring her to rover support and informing her that they can try to help her find a better match (if she doesn't already have other potential sitters in mind).

There's no need to explain more than that. You don't want to make her defensive about what she wants and you don't need to explain that you're not agreeable to all her expectations.

Not every client is a match for every sitter. However, somewhere near her, there likely is a sitter who would be a match.

Addn.: Like Lisa, my non-Rover rates can fluctuate to include hazard pay when appropriate. However, with Rover pups, I generally just decline and it's always crystal clear that it's not up for discussion or explanation. I never say it's due to availability because if it's not a match, I don't want them to continue contacting me. It's generally a very quick declination - unless the client and I have previously discussed behavioral issues that they're aware of and not defensive about in hopes they'll seek out a trainer- and then it's over permanently. (I've read posts about sitters wanting to block clients because the clients keep trying other dates of service.)

I agree with what Deb said. I haven't done it very often, but there have been a couple of times where I've decided not to take a booking. Usually when I'm unsure it works out that they felt it too and find someone else so I don't have to say no. When I have, I haven't gone into details, just said that given my current schedule I am likely not the best fit. I usually try to do that before the booking is finalized but it can be done after, too. I also let them know if they have issues finding someone to let me know. For me, a lot of times I don't have an issue with those extra doggy requests; the issue is generally that the owner and/or the dog are going to be high maintenance and more difficult to care for. An option I have offered is to meet the specialized needs at a higher price - I don't really mind the extra work, but sometimes a little "hazard pay" for the high maintenance people helps me not mind.