Hi I’m a new member. I’m having some issues with 3 of my chickens (white leghorns). So we bought these chicks May 8, 2021. So they’re about 13 weeks old. Put them in the coop with my 2 year old hens (3 barred rocks, and 1 ameracauna) a couple weeks ago…. Needless to say they were being bullied and pecked at, but I didn’t think it was that bad. During the last week two of them were just laying in their bellies and when I tried standing them up they seemed weak, also lot of their chest and belly feathers are missing. Third one seemed weak, but was still able to walk around some. Couple days later I pulled all 3 of them out of coop. They have irritated red skin on chest and won’t stand up. Have been pooping a lot. Very watery and green stools. They were eating/drinking fine, until today (hardly eating or drinking today)…. They’ve been just laying on their chest so much, their skin is starting to break down. Been washing their skin and applying antibiotic ointment. Also place them in a box with blankets under them. Hopefully that will prevent further skin breakdown. Now they don’t wanna eat…. Could they be in shock from being harassed for 2 long weeks? I’m not sure what to do anymore…..?! Please advise!!!!! Thank you!!!!