a buck to follow a doe around about 24hrs before she goes into estrus. she releases hormones that notify the buck that shes ready to be bred. hell stay with her until she allows him to breed her and will breed multiple times during that next24-36hrs. and hell continue to follow her for the next 24 hours because she still secretes the hormone and hell stick around until she stops the secretion and hell move on and continue the process. total time with doe is about 72 hrs. 24 before. 24 hrs during breeding and 24 hrs that she still "smells" like in heat. hopefully my explanation made sense.