Changes

Live nestlings are stunted, have a distended abdomen and '''feather dystrophy'''.

Live nestlings are stunted, have a distended abdomen and '''feather dystrophy'''.

Some nestlings survive with only feather dystrophy: grossly, primary wing [[Fearthers - Anatomy & Physiology|feathers]] and tail feathers are either absent entirely or have thick sheaths and there may be '''haemorrhage in their shafts'''.

Some nestlings survive with only feather dystrophy: grossly, primary wing [[Feathers - Anatomy & Physiology|feathers]] and tail feathers are either absent entirely or have thick sheaths and there may be '''haemorrhage in their shafts'''.

These birds are sometimes also infected with '''Psittacine Beak and Feather Disease Virus'''.

These birds are sometimes also infected with '''Psittacine Beak and Feather Disease Virus'''.