What do you charge for cats?

When clients send a booking request, they are able to see what the total cost of the stay will be based on the rates you've listed. If this client felt the cost was too high, they should have brought it up to you BEFORE they gave you a key to their house and verbally agreed to the sit. You may have been able to come to an agreement on the price. When I was doing drop-ins (I don't anymore due to heavy traffic in my area), I would often adjust my normal rate to be lower/higher depending on the number of pets, difficulty of the sit, driving time, cost of gas, and how often the client booked with me.

I'm not sure what average drop-in rates are in your city. $25/day for one drop in seems reasonable to me. If the client was requesting 2-3 drop-ins per day, I would have offered a discount for the additional visits, especially since cats are quite a bit easier than dogs. They don't need to be walked, or cleaned up after as much- but that's just me! You are free to choose any rate you are comfortable with. If you haven't already, you may want to check out other sitter profiles in your area, see what they are charging, and adjust your rates as needed.

In any case, what this person did was extremely rude. Don't let it discourage you. There are plenty of great clients out there. Sometimes it just takes awhile to find them:)