Yes his poops were dark donuts for the first year. But as his beak started to turn into a dark blue, his droppings changed too.
I read the articles you share carefully, thanks a lot!
You’re the best

Your welcome. Male budgies beaks do turn part blue with maturity, and breeding season.

__________________
"A Smooth Sea,
Never Made A Skillfull Sailor "
Franklin Roosevelt

What do you feed him? What does your bird’s beak look like? my Lovebird has Fatty liver disease- I got him this way. He gets sprouted seeds, organic milk thistle, Organic nettle leaf, avian herbs, and dandelion to help him detox. I also add a little apple cider vinegar and chlorophyll (separately) every once in a while to his water. In a squirt bottle I put a few drops of apple cider vinegar and aloe(from a plant) mixed with water and mist him.

https://parrotbliss.com/fld/