Usually I use them to color my pet to a hard-to-obtain color, but right now I am very happy with my selection of pets and don't really want to use it for that purpose. I'd use it to train my pet but I'm too worried they'll come out with a pet design I MUST HAVE later on, so I'm conflicted on how to use it.

So it's just been sitting here in my inventory locked for the past few months, but I just started wondering if they expire. They don't, right?

I'm pretty sure they don't, Ive heard from Users who have too many to even lock them all in their Inventory.

Okay thanks! :)