True, a doe will bleat for what ever reasons may it be to gather her fawns or just to talk to other deer. The bleat call has been around longer than I have. Recently the heat/bleat or estrous bleat has become very popular along with the buck growl or buck roar. I personaly havent heard a deer do either but lots of people sure have luck using the calls. Fact of the matter being bucks really dont want anything to do with does until they are getting close to coming in heat and vise versa, so a doe call will be most effective during the rut.