Bobert, go visit a big huntin' 'n' fishin' store like Cabela's or Bass Pro Shop or Gander Mountain (or look online). Get yourself some coyote or wolf urine and use a few drops at a time where the deer are likely to come in.

Yeah, they sell both coyote and wolf piss. Also fox pee.

I've been trying to find mountain lion and grizzly, but no luck yet. I'm glad I'm not the guy who has to get the cougar to pee in the little bottle....