Just curious, how much should I tip the girl who will be caring for my cats? I have two cats and she will be visiting twice a day for three days, and once a day on the fourth day. She works with a local pet sitting service and the total cost is $98. Is 20% ($20) customary for good service (how sure how to rate it since I can't really ask my cats
)? How would I go about getting the tip to her? Would I mail it to the company and ask them to pass it on to her? I will leave my key with the company for future use, so won't be seeing the sitter after I get back home.