Beginning feather issues?

Hello!

Yesterday I’ve noticed that my baby Zazu (IRN) has some bald spots above his nostrils. Today the bald area appears to be larger than yesterday. At first I thought it’s because of him hanging on the cage bars a lot and kinda chewing on them (i upgraded him to a bigger cage, yet he still does this and doesn’t want to stay there if he knows i’m around).
But when I tried running my fingers through his little head to check for maybe some mites/lice, 5 of his small feathers just fell without me putting any pressure when checking (didn’t find any bugs on his skin). I can’t help but start worrying about it. It can’t be a molt as he’s only 3-3.5 months old.

Any idea what could that be?

I clean his cage often, wipe the dust, change the water everyday and his diet mainly consists of pellets, vegetables and some fruits.

I have an appointment to the vet on Saturday for nail trimming and of course I will ask about this. But maybe someone has any knowledge on this matter?

I will attach some pictures so you could see what I’m talking about.

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