My cockatiel is sneezing and has dark green, stringy poop. What's wrong?
I'm sorry to hear Ophelia isn't doing well. If she's had any other signs of illness such as changes in eating and drinking habits (drinking less water), or seems listless, is losing weight, etc. I would be concerned that there is something underlying such as an illness, infection or even parasites which are also causing the stool changes.
You didn't mention if you give her treats or have changed her diet, but sudden changes in diet or an excess of fruits and veggie treats can sometimes cause color and stool changes, which should resolve after getting used to the new food, or removing any extras other than her regular diet. Pellets in diets can also sometimes cause stool changes or color changes as well. If she is otherwise normal and healthy and you made this change, then giving it a day or two to see if it returns to normal may help.
However, if the problem continues, she seems in distress, or you haven't made any changes, then having your vet take a look and bringing in a sample of Ophelia's stool to your vet for a fecal test is best to rule out more serious issues.
Updated on September 23rd, 2025