Baby budgie - undigested seed in poop

I just got a baby budgie and according to the seller it’s around 6 weeks and is eating by itself.

However, I just got home and noticed that it has undigested seed in his poop.

Does this mean it too early for it to be eating seeds?

I’m planning on taking him to an avian vet tomorrow since it is New Years Day today and no vets are open.