I feed layena pellets, but I also give out scratch and BOSS every other day or so. They were ignoring them quite thoroughly today. I can only assumed they were happy to simply feast on the eggs instead. Sometimes (once a weekish?) I throw out an extra handful of oyster shell to make sure they have all the calcium they need. They are not skinny, confined to their coop at all, or unhealthy looking, big red combs and wattles are really coming in and I am hearing egg songs. Foraging is hard right now because of the snow and frozen ground but I scatter their feed outdoors, they don't just get it in a bowl they have to dig and scratch for it. They also have a rabbit hutch right near by which regularly has hay, 18% rabbit feed and cracked corn spilling out of it into their pen and is nice and sheltered and snow-free underneath. They have a few other snow-free areas in their pen, too, which is 800+ square feet, including areas up off the ground. They even have a small compost pile with food scraps inside their pen. Their water and food is always OUTSIDE of the coop to encourage them to be OUT even though they don't always want to be, and sure enough they all typically can all but 1-2 be seen outside every day, albeit hanging around the coop but always out. These are not exactly poorly cared for birds, you know? They live in Suburban Birdie Paradise! These are the best cared for chickens within many of the neighboring cities! I have high standards.
I saw my first eaten egg weeks ago, around the middle/end of January in the deep cold. Froze, out of the nest, half missing and the yolk clearly eaten out by pecking beaks but only AFTER it froze. I could see the beak marks. I chalked it up to exactly what you mentioned, Bee. I am young, but try to be wise and I know if a bird gets an open egg they will eat it happily, it's good for them, and the eggs were cracking from the cold. The chicken layed a fragile egg, it froze and cracked open, they ate it, no biggie. I tossed it out for them to finish off. I saw another similar one a few weeks ago and the beau found egg and shell leftovers in the nest box. Now I found one nest with a LOT of yolk at the end of it on the wall, and then the incident where they decided to just attack the fresh, totally fine eggs and I am wondering if they haven't been trying to deliberately crack open and eat the eggs all along and that is why I was only getting 3-5 eggs a week for such a long time? Then the warm hit, the hens started laying like crazy again or so I thought but now I wonder if they are not ALL laying (I have 8 hens, been getting around 4 eggs a day) and I am just having half the eggs eaten by the marauding birds.
So yeah, hence my search for answers! Moving/changing the nests isn't an easy option since they're part of my coop wall. As in there is no wall where the nest boxes are. I oculd try to load them with LOTS of bedding....

These two birds seem to not want to bother leaving the coop at all! But they even found the eggs in my outdoor "nest box"! (Sideways bucket, deep and skinny at one end.) There was egg yolk all over it! I saw one day that some of my hens were fighting over a nest box or so I thought... I now recognize it was one hen trying to lay in peace while the other two kept trying to see if she'd layed an egg for them to eat (!!!). She got mad and kept pecking them back, even shortly after she'd layed the egg and she tried to defend it from them, and so they started to fuss and fight a little. I was trying to figure out why they were trying to steal the egg from her like broodies, but obvs not brooding. I took away the egg and was thought it was kind of odd. Now I know!
I'm really not sure what to do with them I will HAVE to separate them out so they don't teach my other ladies this I think. It is a VERY bad habit and at least 2 are doing it! Shouldn't be too hard to catch them. Put an egg in the nest and wait for one of them to crack it open! 9_9; Wash, rinse repeat... I just don't want to cull if I don't have too. Getting chickens is a pain for me. But this is really unacceptable behavior. I will also try feeding more, more treats, etc.
.. But...
I am at a total loss.
