ORIGINAL: 442deer
I've seen this happen 100 times. A doe who is not in heat will almost turn inside out trying to get away from a doe who is in heat. Why? Because, she does not want to be harrassed and chased by a big horny buck when he gets a snootfull of a hot doe.
I totally agree, have seen this occur before too. I noticed last year that in a spot known for does, I would see 0 if I had estrus out.