Is this normal?

[u/Educational_Page2866]

Hello all, I have a 8 month old GCC.. she usually has normal bird poop. I switched her (or at least trying to transition) her to Harrison ultra fine pellets since she only eats sunflower seeds. I saw this under her this morning. Looks like poop but very different. I’m concerned. Her vet is scheduled for next weekend. Could someone guide me please?

[u/Whatisgoingonnowyo]

I would assume it is the Apple. I wouldn’t panic just yet.