The traditional advice with deer is to get some female pheremones -- found most often, apparently, in stores marketing towards hunters -- and hope to get lucky.
Then there's the fags over in /zoocore/ who want you to hold one down and rape it to show it who the alpha predator is or something stupid like that.
Strike a balance between anthropomorphising a deer's mental processes and pretending it isn't a sapient critter, and the answer becomes clear: use its own mental programmin' to find a way to get some delicious deer sex, man. Good luck to ya'.