Paint ball gun. It's dog friendly by virtue of the fact it isn't lethal.

Cayen pepper on the garden usually works.
(2 effects, makes the dog sneeze & eyes water and will cause the "ring of fire" effect if it sits on the garden.

Phased plasma rifle in the 40 watt range.

Not sure if it works on dogs but I solved the problem of next doors cat by using moth balls.

A sprinkling of them lasts for about two months. The only problem is that I can smell them too.