03-03-2017, 01:56 PM
From your other thread created last month, you said you were in the process of removing all nest boxes from the aviary and taking strict measures to prevent further breeding from your flock that was in a colony setting: what can we do?
What diet is your current breeding pair on?
From this update, I assume this is a new clutch. The reasons for the lack of feathers can be due to plucking from one of the parents or intruder bird, from lack of proper nourishment combined with lack of control on the situation by not giving the pairs adequate rest between clutches, making them to not be in top physical health and condition to breed and in consequence of risking their lives and the healthy development of any chicks.
Another plausible reason could also be French moult.
You truly need to take the advice given on your previous thread and separate the males from the females and give them a good rest from breeding.
Additionally any budgies you might have that are showing signs of being unwell (same goes for chicks) should be properly examined by an avian vet specialist or at the very least a competent vet experienced with birds.
RIP sweet Tito (Summer 2008 - January 17th 2013).
You are missed and never will be forgotten.