*Might* have eaten a small plastic pellet- What to watch for?

[Morrigan]

So I had my girls out for playtime tonight in the kitchen, and I put down their new timothy hay hut for hiding/snacking. After we were done, I shook out the hut onto the mat and along with the poops I got a bunch of small plastic pellets.
I have no idea where they came from, but there were lots of them wedged into the hay. They're solid, clear, and appear to be a hard plastic.
I have no idea if either of the girls ate one. They both went in and out of the hut and there was some munching on it.

I assume I'm watching for unusual behavior, lethargy, not pooping, not eating, not drinking etc.
How do you tell if one chin is not pooping when there's two of them? They're very bonded, and I'd prefer not to have them hate me for separating them if possible.

They're the size of silica gel beads, but we're mostly sure they're not silica gel (since they're hard and non absorbent)

Aside from digestive blockage and dehydration, what is the worst case scenario?

 

[Morrigan]

Bugger, indications are that it *IS* silica gel.

 

[Cuddlebug]

It looks like you thought of everything. The only way to know which one it is if only one is having problems is to separate them. Do this at a time when they are usually awake. If you do it overnight, that might be all that you need. Hopefully, they didn't eat any of it.