Rumor has it that birth control is just the tip of the iceberg in PETA's plans to have deer "self control" their population.
Currently they are working on a new plan code named operation New Light. New Light's primary goal is to introduce religion to deer. This new deer religion is reported to be called: Gaianity.
The core problem with deer is that their society is ordered around rampant promiscuity. Therefore being a good Gaian requires that Ms. Doe Brighteyes and Mr. Buck Bigantlers be wedded in heavenly bliss in order to please the Earth Mother. Furthermore one of the Gaianity's most important tenants is monogamy upon marriage and abstinence before marriage. Partaking in a promiscuous relationship is strictly forbidden by commandment of the Earth Mother! Mr. Bigantlers must not stray and chase single Ms. Longshanks in the heat of the rut! Failure to return home to Mrs. Bigantlers, will assure eternal damnation in a hell so filled with fire and brimstone, even Dante would quiver at its wickedness.
On the other hand, strict adherance to Gaianity's tenants will assure an eternal place in the Holy Forest with the Earth Mother, upon timely death. Please note that the Holy Forest should not be confused with Eden. In Gaianity, Eden is a bad place, where animal flesh was consumed!
The combination of project New Light, birth control, and RU-486 (the French are already gearing up for big time sales) for deer will certainly bring the deer population under "self control". And it is so, because the Earth Mother conceived it.
What can you do as a hunter to stop project New Light? Break up these religous congregations. High level intellegence reports that PETA is also using food plots (well... well... well...) to aggregate unsupecting deer and then convert them to Gaianity. Be careful fellow hunter! Intellegence also believes the food plots are doubling as training grounds for deer-mercs. Mixing religion and militarism seems to be a common theme these days.
Good plan on the whistling thingy's, Chuck. Be forewarned though, recon reports that mule class deer-merc have been outfitted with counter-measures. Ear plugs!