Why kids loves eating chicken joy?

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I had this niece that loves chicken , everytime we go malling her usual order in any fastfood center are chicken and rice. Even its already snack time she still likes to order such type of food, sometimes I even scolded her that she just eaten chicken on lunch and she still wants to eat chicken again. But to my surprised she doesnt want any other stuff but chicken only and rice again and again, what's with chicken anyway that kids loves it?.Why most of our kids loves chicken joy?