Guinea eggs under hens may or may not hatch starting on day 26. I had two different broody chickens that would hatch guinea eggs for me. One hen would hatch all viable guinea eggs given to her on day 26. The other hen would hatch all viable guinea eggs given to her on day 28. All of the...
It depends on the size of your hens. I used to put a dozen guinea eggs under my Brahma/Cornish hen. If all 12 were fertile, she would hatch all 12 on day 26.
That is a good way to waste your money on those eggs. If a hen isn't broody, putting eggs out there is not going to make her go broody.
Not all guinea hens will go broody.
A guinea hen that has not been broody is not very likely to accept newly hatched keets. When I used broody chicken hens to hatch guinea eggs, I would move the keets to the brooder as soon as they were dry and fluffed. Some people let their broody chickens raise the keets. I don't because of...