Originally posted by DarthTanyon:

(...) chickens, eggs, chicks at any one time.

Got me thinking.
A hen is an adult female of the species.
A chick is any young bird.
Chick+hen = chicken. A young hen.

And yes... Chickens are smaller than hens in Valheim. Although the texture doesn't show it, they grow smaller as they grow up. You can use that fact to filter them. Hope they never patch that.