Primos Original The Can Deer Call 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. Features: Trusted for decades 100% designed and tested for the toughest situations and environments Original Estrus Bleat for the rut Quiet Carry Thumbhole #1 Deer Call of All Time