My three ducklings

[Manahil]

Hello everyone I'm very worried about my ducks hope someone can help me
They are getting bald spots on their face, neck and on their back.
Is it normal? Or are they sick?

 

[sourland]

How old are they, are they crowded, can you post pictures ?

 

[Manahil]

How old are they, are they crowded, can you post pictures ?

They are 1 month old and they sleep in a box