Need Help Diagnosing

[BellaBean]

Hi chicken experts,

I'd love some help in dx why 3 of my chickens passed this week.
They have a clean coop, always fresh water, food hasn't changed... Literally nothing has changed in the last 4 months.

This week I noticed that the 2 year old and a 6 mo old were kind of acting lethargic. Day 2: they were acting normal. Day 3: dead in coop

Then it happened again to another chicken a few days later.

Everyone's waddles are normal colored. There are no mites on their legs, their stools looked normal- no blood or diarrhea. I have no clue what is going on. I haven't been around other birds. They got the same amount of lettuce and cucumber scraps.... it is bizarre. Suggestions? thank you!

 

[roonster]

Heat? people say they are losing because of temp...

 

[BellaBean]

Heat? people say they are losing because of temp...

I don't think so. We're in Colorado and it's been in the low 80s. Coop has a lot of ventilation. It's really bizarre

 

[coach723]

Many times the only way to know what's going on is to have one necropsied, especially when you lose more than one bird with similar symptoms. They can be completely unrelated, or it could be something contagious. Necropsy is he only way to know. If you still have the body, I would send it for necropsy. If you don't, and lose another, I would plan to send that one.
https://www.aphis.usda.gov/animal_health/nahln/downloads/all_nahln_lab_list.pdf