Estrus™ Bleats tell bucks that a doe is ready to breed. Whitetail, Blacktail, and Mule Deer can all respond quickly and dramatically to the “quivering” doe Estrus™ Bleat produced by “THE Original CAN®”. This is, by far, the best call we know of to call in bucks during the pre-rut, rut, and post-rut. Perfect for Whitetail, Blacktail and Mule Deer.