ORIGINAL: dabowhunter
I may be wrong but I believe the estrous cycle is related to photoperiodism. The Pineal gland in the brain controls it and it is related to the lenght of daylight. That is why the rut always close to the same dates. I believe the captive does are kept in pens where the handlers control the daylight so they can induce estrous. I used to have a lot of success with doe pee but the last ten years I have not even brought in one buck with it...........dabow
According to fellow member Sunset , whose family owns a pee farm , it's a combination of light control and hormones that are used to induce estrous in captive does . You don't really want to know how they "milk" a buck , let's just leave it at "it requires the use of an electrical device and a very open mind ."