There are quite a few people in SG keeping palms and some farms have larger breeding stocks of them.

None of these that I have seen have the symptoms which are chronic.

If you have been keeping and managing more birds than the one individual exhibiting symptoms, then it is probably unlikely that the cause can be attributed to nutrition.

PFBD is the main and common virus affecting feathers and the only way to eliminate this possibility is to obtain a sample for a virological test.

This virus can and will spread by close contact to other healthy birds.