In all honestly Mary i would not do it, even if you have a disclaimer in there, if something goes wrong ,you are going to feel responsible and bad, i had considered doing a pet sitter service in my area too, and it was not something i had even thought about ,but now that you mention it, i would not go there, just my opinion for what it is worth, hey and good luck with it all, if anyone can make a go of it YOU can.

I love your chosen name Mary and also your's Donna, gosh i could only come up with Caroles cat sitting services Duh how creative of me lol.