First, try your local liquor store. They got lots.
No, seriously, the latest seasonal event has a quest where you have to kill 40 Wild Turkeys, and you only have 30 seconds between kills to get the next one, or the counter resets.
The only place to find them are Elwynn Forest, or Tirisfal Glades.
Competition, as you might have noticed, is fierce.
If you are a Druid, make sure you eat some Tracker Snacks.
The Turkeys are level 1 Beasts, so you will be able to track them, to help you find that crucial next one.
You buy the recipe from the Dalaran Cooking trainer.
That is all.