How to start Dog Walking business?

Very simple. Place ads in the newspaper. Put adds in trees or walls or anywhere that you can put these things. So one thing you can also go online to look for people who need someone to take care of the dogs for a while, and you can talk to them about it, and if you do a good job, they will tell their friends, and so on, and by the time you know it, you'll have a lot of business. But wait, it will not happen overnight.