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Written by Celia Berrell

Ashamed dog with puddle of pee
Image: Thinkstock

Regardless if it’s yours or mine,
why is urine yellow?
It’s mostly made of water
yet becomes a stinky fellow!

When blood’s red heme is broken down,
it goes from brown to gold.
You’ll see this if you get a bruise
and watch it growing old.

Stale pee will form ammonia.
We once used it as bleach
to help make washing brighter white.
It’s got a stinging reek.

Regardless if it’s yours or mine
heme makes urine yellow.
And traces of ammonia
will make old urine smell-o!

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