A blogger who lives in the Southern Hemisphere where the seasons are six months ahead of ours writes "I have about four Fife’s out of a hundred that are losing their feathers only on the front of the neck. The birds vary in age, some are even unflighted. I have never seen this before and do not know what is causing it. Could you perhaps let me know if this was encountered by someone else and how can this be treated?"
If you are familiar with this problem, let us hear from you.