Once the rut is on, you are LESS likely to be successful rattling... when the does are hot, bucks are following their noses or an actual doe more so than their ears... your best success will come pre-rut... the bucks are getting randy, but the does have not come into estrus yet. Going back over my experiences, in Ontario, I have had the most success rattling during the last few days of October and first few days of November.