Hello, I have 3 chickens of mine that are all almost 2 years old. They have all stopped egg production. Ruby, a Rhode Island Red, has stopped late last year and has been pooping white runny poop every night. Thor, a blue wheaten ameracauna has stopped over the summer. Pary, a light brahma, stopped early last summer, and seems to have a swollen vent. It has been a bit cold, at 35°F every morning where I live. We have also mixed our flock with another flock of 4, but I seem fine together. They also have a worm problem, but we are taking care of them now. I hope you guys can help figure out what is wrong and how to fix it, because I'm stumped.