Doctor beamed.
As best a vulture could, at least.
He folded his wings neatly behind him, pulling himself up a little straighter, and offering Vivianite a benevolent look. "You are my first real test subject, little one; and so I shall call you One, at least until the Overseer returns. Perhaps if he knows the name of your gemstone we can extend that, hm? Now--I am Doctor. You're going to feel a little pain, but it won't last very long, yes? And it will be for the good of all-" he turned to Alpha, here. No point in delaying, in drawing this out. Best to get the hard part over with, and he could explain further as the child--hopefully--recovered.
"Thank you, Orthoclase-Alpha. Would you do me a favor, please, and break the right front, and right hind legs? -You may take a rat, or some water, if you're hungry," he added to Alpha. Accompanying this was a nod up to the ledge, where upturned, half-buried skulls served as both water bowls and potted plant holders. Herbs grew there, and water lay stored in the heat; a few rats, spines broken, lay paralyzed on the rock. "None of them are diseased, currently."
He paced away a little, to give them room, and continued speaking. "More control subjects would be better, of course, but we make do with what we have, yes? Ha. Well, breaking one side--that will tell us, as it recovers, whether an early break causes issues later on. Stunted growth, slow movement, compared to the other side. Important information for the Overseer's tests, designs, and so forth, I should think..." Doctor rambled on, waddling up to his rats to check them briefly over--leaving Alpha to, hopefully, the dirty work.