Like the other guys have said, let it lay for at least an hour.

Then what I do is look until I get tired (fatigued and stupid) usually 2-3 hours. Then get some sleep and start out again at first light.

Take a roll of toilet paper with you to mark where you have already looked, use a system. I use an overlapping spiral system.

I'm the guy who nobody really likes, but always answers the call when someone needs a dog. Most dogs will start eating from the rectum in. That green stuff is a tasty treat for them. They can pick up that scent from a long ways off.