I don't know that I would say they are bad mothers. I think our weather has so much to do with it. Guinea keets are fully capable of keeping up with momma guinea's frenetic rushing around, but they are easily chilled on our cool, damp mornings and that is what usually gets them. I am sure in their native climate things are very different.
I prefer to incubate the eggs myself as personal experience in chasing guinea keets has shown me that it is much easier that way! While chicks may cheap and cry when they are separated from their mother, a guinea keet will go to ground and remain perfectly still and quiet.
Even a well-manicured lawn (not that we have one!) can make looking for a day-old keet feel like searching for a needle in a haystack.
And do I even need to mention what an angry guinea momma is like when you are trying to catch her babies?
Yep. I agree that incubating the eggs is the easy way to go.