卡蛋結會在鳥類中發生嗎？會。雌鳥無法把蛋排出，可能蛋被卡在排泄口或生殖器官內。
【Egg Binding In Birds】
Does egg binding happen in birds? Yes. Egg bindings means a female birds is unable to pass an egg that may be stuck near the cloaca or further inside the reproductive tract.
【Do Birds Fart?】
Do birds fart? The answer is “No”. However, I have heard one of my lovebirds emitted fart-like sound. Why would it happen?
【雀鳥放屁嗎？】
雀鳥放屁嗎？ 答案是不會”。 但是，我其中一隻愛情鳥亦曾經發出了類似屁的聲音。為什麼會有這樣的事情發生？
Care For Your Birds - Beginners' Guide【新手飼養雀鳥指南】 