I have a flock of 22 total, 14 of which are about 1.5 years old....the other 8 are about 5months old...the 8 are laying their pullet eggs faithfully.....the 14 1 1/2 yr. olds are really not doing as well....everyone is eating the same laying feed...they get to free range from about 12-8 everyday...even when it rains...which we have had TONS of this summer.......LOTS OF RAIN.....I have started giving them vitamins in their waterers, they get treats, such as a birdseed/oats/BOSS mix about 1x a day...they are not going hungry, the feeders are ALWAYS with food.....I don't know what else to do. Ideas and suggestions are quite welcome.....