Dark blue chicken droppings?

[Aubrinator]

I'm not sure if this is serious, but all 3 of my chickens (2 Ameracaunas, 1cochin mix) have been having dark blue poop for a few months now, since the beginning of summer. None have had any blue foods. It is also slightly runny. I would appreciate it tremendously if someone more advanced in chicken medicine could help me out here. Thanks!

P.S. They have been eating many yellow flowers off our bushes lately.

 

[Imp]

Are they getting any purple cabbage? That is the only thing I can remember reading that causes blue poop.
If it's been going on for months, and they are not acting sick, I'd be inclined to not worry.

Imp- hmm

did a little looking around apparently berries esp. mulberries and blueberries can cause it too.

and moldy grains.

And some Kale.

 

[centrarchid]

Do they have access to any recently seeded area or bags of grass seeds? I am not aware of any naturally occuring blue pigments they might consume unless for some kind of berry (mulberry, black/raspberry, blueberry, choke cherry) that would be available for an extended period of time.

 

[Aubrinator]

They do spend most of their free time under a berry tree,but I don't know what type it is. That's probably it, though. They don't act sick, so I think they're fine. Thanks for the explanations, I have been confused over this for days

 

[Imp]

This guy I work with, helps his brother farm pumpkins. They just got 29 chicks to raise for the farm. I told my coworker to feed his brothers chickens purple cabbage and watch him freak out at the neon blue poop.

Imp-