Yeah, that was clearly indicated.
What else? Mice, rats, wild birds, chipmunks, squirrels? Weigh your feed, if over the quarter pound per day per bird rule of thumb you are feeding something else.
Nine birds, quarter pound per bird, no more than 2.25 pounds per day and that is more than enough even for a growing bird. A coffee can ought to be at least twice that.
Are you feeding more than the chickens?