How long can Guineas lay eggs?

[racuda]

Do they slow down or stop laying when they get older? How old? About half of my flock is six years old, but I can tell who lays what and I'm not finding enough eggs to prove all of the hens are laying. Of course they are great nest hiders, so maybe they ARE still laying.

 

[red horse ranch]

My oldest guinea hens are just 4 but they do seem to have slowed down their laying the last year or two. They start laying later in the spring and quit laying earlier in the fall. None of my 4 yr old guinea hens have started laying yet this spring although the younger ones have been laying eggs for several weeks.

 

[Foxs Fowl Farm]

I just read last night. Found it again. I am in my first year of raising guineas. I have lots of questions too.
This is my first egg laying season with 4 hens and 5 males.
I copied and pasted:
EGG PRODUCTION
The number of eggs a guinea hen will lay depends on her breeding and management. A hen that is of a good stock and is carefully managed may lay 100 or more eggs a year. Generally, breeders produce well for 2 to 3 years; sometimes they are kept as long as 4 to 5 years in small flocks. In such flocks, hens usually lay about 30 eggs and then go broody. Selection of breeders for egg and meat production traits, as practised with chickens, would likely result in considerable improvement.