heat cycles

[b.b.b kennels]

Got a call from a friend that bought some females when we sold out most of our dogs and said they're in heat. The mother of the two gyps in heat is on my yard and her cycle starts exactly on the same day. I know that female dogs have been known to sync cycles when kept around each other but these dogs were never kenneled together and the mother of the gyp on my yard who was Never on the same yard as her daughter after she turned 3 months old also started her heat cycles almost on the exact same day. That's three generations of females that start their cycle on the same day... I'm wondering, are heat cycles hereditary? Also, know there's old time dogmen on here that have all kinds of info and theories on gyps' heat cycles- lets hear them...

[halfbreed]

  spring and winter usually within a week before or after the last cycle . most all the gyps I have owned have come in in December or January ,my coon hound gyps would all ways come in right in the middle of hide season and would have to be put up . that's why I all ways keep a couple good males to hunt in winter . I'm watching all my gyps like an old male dog now to make sure they get put up when they come in , I've had a stray walker male running around and can't catch him . but he sure sounds purty running and treeing in the bottom behind the house .