I have 4 hens - (1 Rhode Island, 1 Buff, 1 Black Sex Link & 1 Silver Laced Wyandotte) they are all know 23-25 weeks old) I have been getting one egg fairly consistenly from I think my Black Sex Link - I have had a couple days where I have 2 eggs, but have never had more than that - they are all on layer feed so I am not sure what is going on - these are our first chickens - HELP Please!