Just FYI....Pepper spray is overkill, IMHO, and there's always the issue of the breeze taking it where it doesn't need to be.

Fill a squirt bottle with 1/2 ammonia and 1/2 water. It works wonders and will also keep dogs and other pesky critters from rummaging through trash cans. I am from a rural area in the US and it's a trick that water meter and electric meter readers use all the time. It's effectice, low cost, and has no real ill effect on the animals other than as a deterrent.