Here's why:
* They maintain a constant body temperature: Unlike cold-blooded animals, hens can regulate their internal body temperature regardless of the external environment. This allows them to remain active in a wider range of temperatures.
* They generate their own heat: Hens have a high metabolic rate, which means they produce their own heat through the process of cellular respiration.
* They have adaptations to conserve heat: Hens have feathers that help insulate them and keep them warm.
So, while they may be covered in feathers, they are definitely warm-blooded!