Chickens do not pee, and they don’t have a urethra. They have only one opening called the cloaca which is used for feces, urea, mating, and eggs.
The waste product normally found in urine is called urea . This is the white part of chicken droppings. If they have a lot of water to get rid of, then it will be runny, but they never urinate separately.
This is the same for a lot of birds too.
