Adding on that, guineafowls begin to lay from 7 to 10 months old (normal).they do hatch their own keets if allowed and some of them do make good parents.hybrids of guineas with chickens or other fowl happen at certain times. If guineas &chickens or pheasant s were raised together from younglings the is a possibility that they can mate especially if the are no male guineas.
guineafowls are monogamous, pairs bond for life but although polygamy has been reported. wild guineafowls are generally monogamous paring for life than domesticated guineas.
I have 7 guineas,4 hens and 3 males
from their first breeding the flock began' to split the alfa male take two girls and bond with them. but 2rd hen was left alone after the 1st hen began to lay.
The lonely hen spent her time with chickens and ducks, when 1st hen went broody her mate guard her, I've seen him coming one day, the lonely hen begin to buck-wheat, he begin to display dropping and catching food in fron of her but they never bond. so I decided to brought her a mate, I brought a male that was 2 year older than her, it took them sometime to bond as the Alfa male was jelouś, the new male was slightly older than my guineas and more bigger than them.I've noticed that in guineas the male's must fight and win so to be selected by hens...then from the, the pair never split or add even thought the are still now extra hens in my flock
So I can say guineas are monogamous and polygamous although often rare.