chiggers: A common external parasite of chickens (and humans) that feed on blood while injecting an irritant into the skin.

Coccidia: An internal parasite of chickens that lines the digestive tract and may cause serious problems.

coccidiosis: An infection by Coccidia.

coccidiostats: A medicine that controls the disease coccidiosis; often added to commercial chicken feed.

cockerel: A young male chicken.

County Extension agent: A county employee, sometimes called an educator, who is associated with a land-grant university in the same state and whose job is to take research-based knowledge and bring it to the general public.

crumbles: Medium-sized pieces of feed, actually broken-up pellets.