look at the grey parrot's wings, in the right cage. those are some fucking cramped conditions for those birds - if this is a pet shop it should get shut down immediately
I'm sure they're fine...just looks like a temporary weaning cage. They're not fully feathered yet, and are still doing the 'feed me, seymour!' headbobs.
It doesn't bother the birds. Most parrots are cavity-nesters anyway, and in the wild would be growing up in very cramped conditions. Containers also make it easier to keep them warm.