I don't really know why ; but they will get strighted out on there cycle and come in, in the middle of hunting season every year.it seems to always work that way,so you lose them for about 3 weeks durning the season,unless you only have females,then you can hunt them or by them sleves.

I did have one bitch thay someone threw out in my dads yard.she was a real good hunter.I hunted her for 4 years (she was an older dog when we got her)and though she was spaded and then she came in and gave me pups.