I'm not sure about your geographic location, but I live in a rural area. If the person caring for my animals is not a close neighbor, then likely their home or work is 20 minutes or more away. If someone is not staying at my home and coming over 2 times a day, I am paying them for their service plus 40 minutes or more of drive time per trip. The cost of hiring a pet sitter gets much more expensive when they don't live down the street or stay at your home. With your pricing consider a map, anyone that lives within a certain radius is one price, if you live outside that circle perhaps you add a $10 per trip fee or something to cover your extra time and gas. Consider how many times a day you are stopping at their house in your pricing so that people are paying per trip vs. per day. For instance if it was my flock plus my cats I might only want someone to come once a day or once every other day, but my dogs would need to be let out and fed twice or more a day. Every situation is different. Make sure you are clear with clients ahead of time what the charges will be, a simple contract that at least states their names, the dates, and the agreed price will help. I would not charge per animal, but maybe by the kind of animal. Is it harder to care for one chicken vs. 10? You are still just filling a food dish and a water container and maybe opening a gate? Are two cats harder than one? Again, just a food dish and water dish and shared litter box. Maybe 10 cats would be harder than one or two, so decide some sort of cut off number or something. You can bill daily dog walks in 15 minute or half hour increments. There are a lot of factors, but you can certainly come up with a good starting point for your pricing. Is watering plants extra? What about bringing in the mail? Will you take the trash out to the curb on time on trash day? If it snows and you have to shovel to get to the coops/sheds/house, etc. do you charge for that? What if the driveway isn't plowed and you have to walk a half mile? What if you have multiple clients that need their animals serviced at the same time of day and they live on opposite ends of your service area?