Broiler chickens (Gallus gallus domesticus), or broilers, are a gallinaceous domesticated fowl, bred and raised specifically for meat production.he breeding stock (broiler-breeders) grow to maturity and beyond but also have welfare issues related to frustration of a high feeding motivation and beak trimming. Broilers are usually grown as mixed-sex flocks in large sheds under intensive conditions, but some breeds can be grown as free-range flocks.