MoparKid, you are correct in regards to the chicken but did you know that The rooster has a Cloaca, not a *****, which transfers sperm to the hen. The roosters testes are located high up in the abdominal cavity along the spine.
When mating the rooster inverts his cloaca to touch the hens cloaca and transfers a sperm sac containing enough semen for about 10 days worth of fertile eggs to be produced.
AHHHHH, but what came first? the chicken or the egg?
