There are a lot of coyotes where I live. They never cause any problems. If you live where coyotes are a problem, run a couple of strands of electric fence wire around the top your back yard fence. If you install it correctly, it will deter coyotes from climbing your fence. The reason I know is because I use a lot of electric fencing for my cattle operation. Also, Bogey was a climber when he first moved in with us. Some dogs are climbers, some are diggers. I dialed the power way down from what I would use for cattle, and strung one strand around the top of the chain link fence in my back yard. Even though it was set on it's lowest setting, Bogey only had to touch it one time and he was cured of his climbing. If I were trying to deter coyotes I would turn the fence way up.