Wasp spray in a can will shoot with powerful force up to 20 feet. Our local police recommend keeping a can in the house and in the car for self defense purposes. I imagine it will work on 4 legged animals as well as the 2 legged ones!

My ex father-in-law had a racoon problem and was relocating them. He would spray their tail with bright orange spray paint so he could identify if it was one he had recently sent packing. Gave him an idea of how far to take them. I think he figured 20 miles. If you have to cross a river to do it, its a bonus. :-) good luck! *hint* this might also work for that pesky roommate problelm you're having. Lol