Even stranger, Clem, is the fact that my whole life, our deer have started breeding at the exact same time. And, they did it again this year. You can probably search the archives and find some old post from years ago where I said that they will start rubbing and scraping hard about Jan 9-10, cruising hard about Jan 16-17 and breeding around Jan 21-22. It has always been that way. And, unless there is some strange influx of outside genetics, they will probably always do so.
And, it does not matter how many does you shoot!