Last few years I have lost half or more of my tomato crop to towhees and rats. Traps do kill a few, but in order not to kill too many birdies I've got to deploy at dusk and disarm by day--a big pain in the rear. My plan for this year is to stake and prune so that the ground stays clear up to around 12" before there's any foliage/cover. Think this will work? Any other suggestions?