Severe Macaw babies.  Pulled at 12 and 14 days.  The spool of thread is there for size comparison.

3 weeks and just fed!

12 and 14 days old

4 weeks with 'pins' coming in well

5 weeks just starting to show colors

'Prairie doggin' at 7 weeks

6 weeks with more feathers

Looking all grown up at 8 weeks