⠀ Purple cabbage and turquoise poop

[TxAg11]

We recently got 7 hens and I have read that stringing up a cabbage to a string and letting them peck at it is a great way to keep them entertained and well fed. Shortly after they demolished the cabbage (in less that 48 hours- impressive) I noticed that their poop had this odd turquoise coloring to it. Has anyone else experienced this after their chickens have had a large purple cabbage intake?

 

[sourland]

Ever eat beets and notice the next days excretions? Works that way in birds too.

 

[ChickenCanoe]

Or blueberries, mulberries or virtually anything else with color.