Why Are Rubber Ducks Yellow?

Why are rubber ducks yellow
Is it something they ate?
I don't think they eat bananas
That would make them irate

Is it something in the water?
That they swim in so happily
Maybe it's the bubble bath
That they play with blithely

It could be herbal shampoo
That's turning the feathers gold
All of them are affected now
It's getting out of control

Or maybe it's the conditioner
That's causing this colour change
Normal ducks aren't yellow
Something here is very strange

Why are rubber ducks yellow
Did this happen long ago?
Is it something secret and odd?
I guess we'll never know ©

*Gem*

(A random poem, i love my rubber duck =)