Glossary of Chicken Terms

You don’t mention either spent hens or capons in your glossary of names for types of chickens. Why?

What is the process of a Hen laying an egg called?

Here along the Coastal Plain of South Carolina, I've always heard the term "biddy"(pl: biddies) applied to baby chicks, not to adult birds. I've always been told that it is a variant of the word "birdie" with the influence of West African dialects. I had never heard baby chickens referred to as "chicks" until I was in the 4th grade, when I had a teacher who was from Maryland. She was also the first person I ever heard refer to human children as "kids", but that's a different story. I've always called baby chickens "biddies". I have heard from a person in Kentucky who says that where she lives, people call baby chickens "dibbles", and I've seen chicken breeders in North Carolina refer to them as "dibbies". A "pullet" is a female chicken less than a year of age, and a "cockerel" is a male chicken less than a year of age; once they turn a year old they are "hens" or "roosters", respectively. In gamefowl, a male bird under two years of age is called a "stag", and if he is especially fast-developing or masculine, he's called a "bull stag". After he turns two, he's referred to as a "cock", not usually as a "rooster".

Pullets are female chickens that are not sexually matured. That is, less than 5 months of age. livestocking.com