Alrighty, I'll give it a shot. Oh damn, someone posted before I could finish, I'm gonna do it anyway!
Grey finds a rat tail in her salad. It's a little weird that Grey is inside eating something, but you know, assuming she is and let's say it's at a cafe, it's the cheapest thing on the menu and Sabot (another OC) is paying, she's going to be more or less pleased. It might go something like this.
Grey: (holds up her fork and stares at it for a second)
Sabot: I-- Is that.. what? That's a mouse tail isn't it?
Grey: Rat tail, I think.. kinda thick to be a mouse, those things are tiny.. I might not even notice a mouse tail.
Sabot: Not really my point, let's go bother the folks at the counter about this (starts to get up)
Grey: Wait, no... it's protein.. it's protein we didn't even pay for.
Sabot:...
Grey: would you.. would you like a piece?
Sabot:.... yeah, ok..
Scenario: your OC finds a stray dog