In the US, State occupational licensing laws for one. You can't cut someone else's hair without a license in most states. In my state you can't even dog/cat s

In the US, State occupational licensing laws for one. You can't cut someone else's hair without a license in most states. In my state you can't even dog/cat sit for someone for money unless you are going to their house because you need a kennel license to have them stay at your house if they aren't your pet.