Some years ago I had a whistle that was made from a Roe deers antler. I could not get used to it. I think its lying around somewhere. The OH bought it from one of the country fairs.
poddle said:If you need a whistle(?????) then why not buy one for a quid out of your local sports shop.
Why mess around trying to carve one from an antler. Anyway the best way to make a whistle in the wild is from a willow branch, but you will of course need bushcraft skills for that.