My flock is mixed between breeding/hatching seasons. I do not find that my Buckeyes are low on the pecking order at all. Some of the hens are actually higher on the roost then most others, and they don't take much crap off the cockerels around either. The only time I see a bird picked on is if something is wrong with it. I think that if there are parasites bothering that one bird, it is likely due to there being something "off" with it, rather than the color. I find that birds that have some well masked illness or disease going on that they are stressed physically, I will find crawlies on them that are easily visible.
That being said, each birds kind of has its own personality, so maybe she just is that way. I would look it over well and try clearing up any parasites (lice, mites, etc.) Provide them with a good clean, dry, dusting box with Sevin dust or DE if your birds are free from external parasites, as a preventive measure. Having lived in Florida, I know there are bugs in the sandy soil we don't have up here in the North that enjoy bothering all sorts of man and beast, so I would think you would be more vigilant in that region of the country for them?
Good luck with her. Maybe getting Buckeyes from a different source may be a good answer too, each strain comes with their own 'micro' qualities that set it apart from the next.
Good luck.
