No, installing an invisible fence for dogs is not hard. However, it can be labor intensive. If you are using a wireless fence, the installation might be as easy as putting the batteries in the collar and setting the perimeter range on the transmitter. If you are using a wired fence, however, you will need to plan where the underground fence will be buried and then bury it. Depending on the size of the play area you want for your dog, this can be quite a time-consuming endeavor.