Cat deterrent for grass lawn -- Tired of cat p00p

[mattkime]

>>So far the best deterrents seem to be sprinkler sprays with motion detectors. But I don't want to spray the mailman and visitors.

i think the spray would be most effective. you should be able to configure it so it doesn't spray guests.

also, this - http://www.amazon.com/Contech-StayAway-M..._3?ie=UTF8&qid=1374763780&sr=8-3&keywords=cat+deterrent