Have you tried the motion sensor automatic sprinklers?
They work great
Got rid of several damn Deer and many other critters that thought they owned the place
As you I hate to kill them and will try anything not to have to kill them
Cute little smelly things
How about Flickers as in lareg destructive wood peckers they drill holes in the house
So long as they are a longs ways away from me I have not problems
Eat my house I have an issue that wil be resolved soon