Changes

Achromatosis  is caused by a '''lysine deficiency''' in '''dark breeds of chickens''', '''turkeys''' and '''quail'''. It is also caused by a '''riboflavin''' or '''choline''' deficiency in '''growing cockatiels'''. Once rapid growth is complete in these birds, moulting occurs and when feathers regrow they are of a normal pigment.

Achromatosis  is caused by a '''lysine deficiency''' in '''dark breeds of chickens''', '''turkeys''' and '''quail'''. It is also caused by a '''riboflavin''' or '''choline''' deficiency in '''growing cockatiels'''. Once rapid growth is complete in these birds, moulting occurs and when feathers regrow they are of a normal pigment.

Achromatosis is important as it indicates a '''serious sign of an underlying nutritional deficiency''', however the level of pigmentation does not reflect the severity of the deficiency. Only in extreme cases do the feathers not grow at all.

Achromatosis is important as it indicates a '''significant underlying nutritional deficiency''', however the level of pigmentation does not reflect the severity of the deficiency. Only in extreme cases do the feathers not grow at all.

==Diagnosis==

==Diagnosis==