I am starting up a dog walking business and would like to know how other dog walkers take bookings and payments? Do you take weekly bookings and payments upfront? Do you book a whole month or two months? Also what do you do if you can't do a certain day because of illness or an appointment you need to attend? I have so many things going around in my head ! I am sure (or hoping!) things will fall into place once I get going . Any advice greatly appreciated.