From https://www.reddit.com/r/Minecraft/comments/6b0fkh/dear_mojang_please_remove_feeding_chocolate_to/ :

Dear Mojang. Please remove feeding chocolate to birds to make them breed. Millions of kids will play this game. You picked the one food in the game that will kill them to make them breed and tame them. (self.Minecraft)

I get that you want to give chocolate chip cookies a use in the game, but literally millions of kids will play this game and chocolate and pet parrots are common enough that this will cause a problem. There is no question about that. You can't tell me some 6 year old is going to play Minecraft and then try to feed their Mom's 45 year old Macaw chocolate chips or a chocolate chip cookies.

It's a minor change that will have major consequences. Thanks

Edit: A few people have suggested a new item, bird seed, that is made from a mix of a bunch of seeds that are already in the game. Would give us even more of a reason to cultivate more plants and have diverse crops. Even if the chocolate thing never happened I'd prefer this.