If the hen is breeding she will save all her poop up and just come out of the nest box when she has to and will just do big massive poo's which is what this looks like. If you are concerned you can always take a sample to you avian vet and have them look at it under the mircoscope.quote name='Maddy' timestamp='1297139042' post='360775']
I couldn't for the life of me find the topic on budgie poop, so I gave up and started a new topic.
These were found in my breeding pair's cage, about 5 minutes after changing the newspaper
I sat there and waited for the cock bird to defecate to see if it was him (as I didn't recall the hen leaving the nest) but his poos are normal.
The one on the far left has white in it but the other is like a milky colour around the poop. And as you can see by how its soaked into the (clean) newspaper, its very watery.
Upon saying this, the inside of the nest is fairly clean, with a few old egg bum poos (the really big solid ones) and is dry. So I hope its not serious and just stress poop.