How big is the heart of a chicken?

The size of a chicken's heart is surprisingly large relative to its body size.

On average, a chicken heart weighs about 1% of its body weight.

So, a chicken weighing 2 kg (4.4 lbs) would have a heart weighing approximately 20 grams (0.7 oz).

However, it's important to note that:

* Size can vary based on the breed and age of the chicken. Larger breeds tend to have larger hearts.

* Factors like health and activity level can also influence heart size.

* The size of a chicken's heart is also important to consider when understanding its physiology. A larger heart allows for more efficient blood flow and oxygen delivery, which is crucial for active birds.

While it's not a precise measurement, the 1% rule provides a good general idea of the relative size of a chicken's heart.