I am totally at a loss, I have no idea what is going on. I have a "small" flock of chickens, 75 in all,* only 2 roosters in the bunch, both leghorns*, they consist of white leghorns, Rhode Island reds, americaunas, and 1 barred rock the leghorns and RIR are a little over a year old. the others are 9 to 10 months old. the reason I say small is because I am used to being on farms where 3 to 4 hundred is the norm. Anyways.,.... about 5 months ago, I went out to the barn to make sure everyone had plenty of water, and to give a lil treat. I found a very small light brown egg, about the size of a quarter, it had a shell on it, and I brought it in, took pics etc. I knew it was way too early for the newbies to be laying, When I accidently broke it, inside was a lot of white, and just a drop of yolk. after that, nothing. I figured it might be one of those odd flukes that happen from time to time. fast foward to present day. the newbies have begun to lay, the problem is that there are no shells on them. just a soft membrane, I can see the yolk floating inside the sac. My birds are free range, I open the barn door in the morning and its the "running of the chickens". I have 8 gallon waterers where they roost at night. I have at least 20 other gallon and 3 gallon sized waterers scattered around the property where they like to hang out, I rinse and wipe them out daily and refill them. I feed them layer pellets, and offer them crushed oyster shells in a seperate feeder no more than 3 times a week. I do give them scratch now and again, kinda a treat for them, of course they help themselves to the geese's cracked corn. I do offer greens to them once or twice a week, although they much prefer my greenhouse and the veggies I am trying to grow, they have decimated my sugar snap pea plants, and my green beans. they eat every bug that moves and is within distance. they have plenty of shady spots to hide in to get out of the sun. they have the barn overhang, a couple of trailers, the tack shed, the garage, under the stairs etc. I am at a total loss as to why they are laying eggs with no shells. I had one red who would lay with no shells, she had a run in with a fox, and well, anyways you can guess the outcome of that one. As for the others, I used to get a couple of dozen eggs a day, now I am lucky to get any at all. I figure its the heat that is getting to them, so I am a lil less concerned about them than the newbies. I am just scratching my head trying to figure out whats going on. any ideas or imput?