Black tar like poop

[Bek25]

My hen is around 8 years old and has had black tar like poop for one day, what causes that?

 

[nuthatched]

What's her diet?

 

[OrpingtonManiac]

Could you post a picture of her poop?

 

[Bek25]

What's her diet?

Laying crumble and hen scratch daily, treats and worms 2 times a week

 

[OrpingtonManiac]

Does she still lay eggs? If not, she probably doesn't need the layers crumbles.

 

[Bek25]

No she's not laying.

 

[OrpingtonManiac]

Is it possible for you to swap her to an all-flock food? Give her access to oyster shell.

 

[WingItRanch]

If she's acting fine and not showing any other symptoms, it might be cecal poo. Comes in different (disgusting) colors.

Also, when I add wood ash to my chickens' dust bath, they sometimes eat little bits of charcoal and it turns their poop black. Nothing to worry about.