Hi everyone, I'm new to raising chickens and really enjoy it. However, for about two weeks, my two red stars (25 weeks) eggs started disappearing. This may get a little confusing so please try to follow me. They started laying around 20 weeks and were laying one egg every day. Then three days would go by and nothing. Day 4 would come and there would be a egg in the nesting box. This would go on for a few days. Well, one day I found a broken shell in the coop. I started segregated the ones I knew were laying(put in large separate totes with food and water) They laid their eggs and didn't eat them, so they went back in the coop. The next day, one of the red stars laid an egg on the floor of the coop. The egg was cold when I found it and nothing touched it. The eggs started disappearing again. Two days ago, I spotted a bird with yellow on her white feathers. I put her in a tote with an egg to see if she'd eat it. She sat on the egg all day and didn't eat it. Yesterday, I went to open the coop and caught four eating an egg on the floor of the coop. I took note of the four. I then put a egg on the floor of the coop to see if they would eat it. Two of them(of the 4 that I caught eating the egg) came over and pecked it, but lost interest and walked away. The egg sat on the floor of the coop for about 4 hours with nothing eating it. Today, I went to the coop while it was still dark, and one of the red stars(also one of the bird I caught yesterday) was on the floor and there was a broken egg on the floor. I took her out of the coop as well as the egg. About 1/2 hour later I went back out to the coop and their was another broken egg on the floor and two chickens running around. The other 4 were on their perch. I went out about 30 minutes later and the one red star that was on the floor of the coop 30 minutes earlier jumped out of the nesting box and there was a very warm egg in the box. Sorry for the long post, but I don't know what's going on. Are the birds dropping the egg from the perch and they are breaking? 7 chickens (2 red star, 2 black star, 2 arucanas, and 1 buff orpington). They are getting a egg mash from a local feed store. I put a feeder with oyster shells in the coop on Saturday. They are housed in a chicken tractor. The door is only closed during the night and opened in the early morning. It has 3- 12x12 nesting boxes with about 3-4 inches of pine shavings. The run is 50sq feet and the coop is 25 sq ft. I use about 2-3 inches of pine shavings for litter on the floor of the coop, but am going to put about 4-5 inches in today. Any advice you can give me would be greatly appreciated.