My ten chickens, ex bats, are now only producing 1 - 4 eggs per day now. Its spring, they are approx two years old. 2 are not laying at all and have been separated from the group as they were being bullied, tails plucked raw. They now free range on the farm and look well and run about happily, they only ever produced yolkless eggs, very small and sometimes with soft shells. The other chicken are in a 100m enclosure with the rooster who is only a few months old. They are all fed layers mash, mixed corn and household scraps, bread, porridge with egg added, and occasionally sweet corn and butternut squash, cucumber and greens. They look happy enough, but the low egg yield is bothering me. I don't really want just pet chickens. Does anyone think they will start laying soon, or its it all over and I should cull/kill them and get younger ones. I do get on average 2 wrinkly/ deformed eggs per week also. I had one mucky bottom chicken, I now find my best looking chicken is afflicted, she has been bathed and I've bought some live yogurt for the flock to start tomorrow. I added cider vinegar to their water as well. They were last wormed with Flubenvet in Feb, but I did not think they needed regular worming after that. Advice needed please!