For the last two weeks I have had a sick flock. The first bird I noticed looking sick appeared to be lethargic. Quarantined indoors, the next day she started to act paralyzed and display splayed leg. Second bird got sick, quarantined separately indoors- she had same symptoms but also wry neck. Started treating for vitamin deficiency. Then though perhaps botulism or they ate something. Third bird got sick a couple days later with same symptoms except no wry neck (only one bird out of the bunch displayed this). Was worried it could be mareks. Started monitoring the birds heavily. The first couple stopped eating so I syringe fed them. They lived for about a week. Third bird ended up passing away as well. This one I decided to do a diy necropsy. No tumors were prevalent however significant amounts of yellowish fluid surrounded the organs. I’m thinking coccidosis. So I got Corid and started treatment. It’s been 5 days and I now have two other birds under quarantine that are starting with same symptoms. After the first batch died I removed everything from the coop and sanitized and gave new bedding before letting them return. I’m continuing chorid treatment. Photo attached of internals. These birds are about 3 weeks away from laying. Called the hatchery and they said no one else reported anything but they think it’s mereks and swore up and down I wouldn’t be able to see the tumors on the organs. Looking for suggestions.