diana507
Chirping
Check for parasites first. If the area is red this is another give away. They may have had crusty/poo crusted feathers which irritated them and now they are bare. Treat with Ivermectin and maybe give them a little blukote till it grows back in.
The one in the picture just has the white skin showing and the other one looks a little pink but not red or bloody. Can I dust them in DE?