Our cockatiel is not only scratching a lot, but he's also pulling out his feathers!

I thought that maybe his skin is dry seeing it's mid summer here, and like-wise with the feathers. I wondered if he's pulling out his winter plumage because he's hot, but the temperatures have been rather mild so far. Temperatures are still in the 80's.
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I read that they moult at around 6-12 months, but he's still only 2 months old, so I'm confused.

From other things I've read, I believe that's he's a very happy and contented bird. He gets heaps of attention and he's trying hard to talk....although he hasn't managed it yet. He's not far away, but he's not quite there yet.

He gets a good and very varied diet of seed, fresh fruit, fresh vegetables and also other things that I read he should have.

Does anyone have any idea why he's pulling out his feathers?

I tried an online vet today, only to find that they wanted $59 to answer this same question...... I passed!