A while ago, when I had my 9 young roosters and a hen, they figured out how to jump. Extremely high. They would jump and perch on the side of the brooder as soon as it was open, and often would climb on my back as I tried-and failed-to change their water and food. Clearly, they did not want...
Do you feed yours blueberries at all, or is there a place where they can find some in your yard? If so, that may be why, I had that happen a few times, if they have too many blueberries, their poo can be black.
A am somewhat new to chickens, I got mine in around 2019, as I had a lot of time on my hands and had started birdwatching in that year also. This caused me to become very interested in birds in general.
I currently have 5 hens, just a small backyard flock. 2 chocolate orpingtons, one english...
Great article, I have already had one chicken with one blind eye, and right now, her friend is acting very odd and is having much of the same problems, though she is about 3 years right now.