my vote is to never never push the button until absolutely sure...I never could tell for sure unless I saw the deer or the dog that never lies comes back with his head and tail down.
X2.....why risk it if you don't have to....once you shock a dog for ruuning a hog, you can never take it back. It's a pain for your dogs to run a deer or whatever....but not bad enough to risk shocking them for doing right.