Holy Moly. A pound of feed per bird per day?
NO WAY.....
Put down a different feed and hang it in a feeder. Use layer mash as Guinea fowl LOVE this stuff.
I would say, go to your coop or barn around 12 at night and see just what is eating your feed.
I am guessing you have a huge rat problem, a horse or goat or pig or dog that is eating your feed.
TAKE UP the waterers at night, keep them off the floor and up high. The Guineas will find them.
In worst case scenerio, TAKE UP your feeders at night and while the Guineas are out free ranging.
Guineas LOVE to eat and drink right before roost time.
If i had to feed my Guinea hen a pound of feed a day i would not have them.
HOWEVER, remember that if a COON or a POSSUM is in your barn/coop at night they are eating your feed and NOT your Guineas.
Taking the feed up may intice them to go after your birds.
Hope this helps G. G.