I just got my first dairy goats this summer. 2 nubian does, one alpine. I have been watching them every day for signs of them being in heat, but can't tell anything. No vulva swelling, no tail wagging, no one trying to ride anyone, no noisy does. I even got a buck rag from our breeder, I show it to them every day...not interested. Is it possible I'm missing it? We live in upstate New York, it seems like they should have started their cycles by now. Any advice?