I noticed when Rosie was in her first molt most of the blood feather were protected in the wings and you would have to look under the wings to see them. The vet actually showed me. One blood feather on each side all tucked in and protected by ajoining feathers. So totally facinating. Vet told me when they are in a molt give extra calories and protein. The calories we in the nutriberries (3 per day). And yes, birdy PMS in spades.