Question

Are chickens considered animals or birds?​

Answer 1

$\huge\underbrace\mathcal\orange{ᴀɴꜱᴡᴇʀ}$

In short, chickens are both birds and animals because a bird is simply a type of animal, it is one of the subcategories of animal. Birds are animals, a chicken is a bird, so a chicken is a bird and an animal.