I was curious as to whether ducks (most likely white peking, due to availabiltity and familiarity) would turn pink (or experience any slight change in plummage hue) if fed supplements containing what flamingos eat (shrimp, blue green algae…a direct beta carotene supplement???)…the supplements would be mixed in with the regular food or water of the ducks. I’m hoping to prefrom a science experiment…but I will need more grounds before I can actually conduct it.
I don’t think that diet is what makes a flamingo pink - there are plenty of other birds that eat the same foods and they aren’t pink.
Then how come flamingos turn white when they aren’t fed their natural diet?
A flamingo is pink because of its diet but I don’t believe that same diet will make other birds pink. A flamingo will turn white if it is fed other than its natural diet.
From here: http://www.thewildones.org/Animals/flamingo.html
A flamingo’s pink or reddish feather color comes from its diet, which is high in alpha and beta-carotene. People eat beta-carotene when they eat carrots.
You could do what my little brother did to my grandmother’s Bijon Frise. A bathtub full of cherry Koolaid will make just about any white animal pink for a while.
[www.thewildones.org/Animals/flamingo.html#pink]](http://:[url)Someone begs to differ.
Whoops! Not only was I too slow, I screwed up my link! (It was the same as Shagnasty’s though.)
The Master speaks: Are flamingos pink because they eat shrimps?
Now, while flamingos turn white if they don’t get enough carotenoids in their diet, this doesn’t necessarily mean that a white bird will turn pink if fed carotenoids.
On the other hand, at least some birds can have their color changed by fortifying their diet with caroteniods.
As I was quoted in Cecil’s report:
Dunno if it will work on white Peking ducks. I suspect not, since I would think someone would have tried it by now, and I would have come across it somewhere.
But if you have some ducks, and lots and lots of carrots, go for it. Maybe you’ll end up with Duck l’Orange.
Wow. My ignorance has not only been fought it’s been slaughterized 
So does that mean flamingos are the only normally white birds that eat that diet, or that other birds just don’t turn out pink despite eating the same diet?
Or that flamingos are the only birds eating what they eat?
I wouldn’t say flamingos are “normally” white. They are “normally” pink - a highly abnormal diet can turn them white. This is the case for a number of other pink/red birds, such as Roseate Spoonbills or Scarlet Ibis.
But most birds that have red in their plumage obtain it from their diet. I think if you deprived a Cardinal of carotenoids, it would end up looking very faded after it’s next molt (though it wouldn’t go white).
As Cecil’s article mentions, different kinds of flamingos get their caroteniods from different kinds of foods - blue-green algae and shrimp in different species. But carotenoids in general come from plants (or algae, bacteria, etc.), and most plant foods contain at least some, not just carrots.
From here:
This is probably the most drastic color change you’ll make without kool-aid on birds that aren’t related to flamingos. I don’t know if it’s been tried on ducks yet. But it wears off when the adult feathers come in.
If you succeed, can I buy one?
Side note: Chicken legs and beaks are yellow because they pack spare caratenoids into the keratin. They aren’t real picky about what caratenoids, though, so if you feed them red, blue, or green ones you’ll have red, blue, or green legged chicken. Same goes for the yellow color of yolks. So, your red-legged hen will lay red-yolked eggs. Great for Halloween or Easter if you raise your own birds.
Chicken kisses
Interesting link. But just to clarify, the blue or green colors would come from pigments other than carotenoids, which normally give colors in the red/orange/yellow range.
From the linked article:
:dubious: Hmmm . . . a dye that does not contain chemicals would be quite an innovation.
I got the impression from the professor who talked about this that the blue and green ones were synthetics. Could be wrong. I didn’t do well in o-chem.
The chickens you see in the supermarket are that golden color because they were given feed that contained marigolds. I don’t think it colors the feathers, though.
There are also araucana chickens, which lay eggs with blue or green shells. The chicks, if you hatch 'em, are not the color of the shells. They are very colorful, though.
http://www.ansi.okstate.edu/poultry/chickens/araucana/