What if for a few days all of our pets were hatched as naturals, but in the following week an Aprils pot of luck opened and you could dip in 1 pet per day and see what colour the pet would have been if not for Aprils. And if it wasn't going to be natural, you got to keep the colour?
So say
I hatch a Gondra, it's albino (but I don't know that)
April fools makes it Natural ~So I think it's Natural~
A few days later after I have my collection of Naturals,
a pot opens, one that your creatu mysteriously fit into.
One that has rancid smelling blue liquid in it.
I make my critter swim in the pot and when it comes out,
BAM! its the colour it was intended to be.
This way people wonder for days what colour their pet actually is.
And if its supposed to be natural anyway: they get a collectible prize.
Maybe something they can hand into the gift shop in exchange for points towards a Jesters outfit!
edit: Only pets with the birth-date from april 1st and up can dip in the pot
;maybe its kinda poop;