He listened in attentive silence--yet the constant shuffle of a talon or ruffle of a wing, though subtle, betrayed his constant frenetic energy. He was invested; he was involved. He was interested in everything Luna had to say, so much so that he found it difficult not to interject with another excited point.
When she had finished, he straightened, and past the rigidity of the beak it almost looked as though he were beaming. "Excellent questions!" he cried. "I begin with the first, yes-? I value Greater lives more highly," and it was half a question, half a correction. He was assuming that Luna had simply stumbled on her words a bit. "Now, as to why?" He turned, pacing around the motionless rabbit on the rock. "I must give that question consideration. Well--I suppose that those who can speak, think, they are our allies, yes-? And these poor creatures, well." A taloned foot reached out, gently prodding a flaccid, pale-furred belly. "They are food. That is not to say one cannot experiment with a Greater's treatments, of course! Now, I do not advocate inflicting, ahh, unnecessary pain, and perhaps here it is best to answer your next question first--on progress!" He paused, shuffling to fully face Luna, calling on his magic.
"For one thing, my magic allows me to see the micro-fields inside of your body." That was not, of course, a proper name. Gut biome, maybe. But 'fields'--well, he imagined them akin to Pegasus's sprawling grasslands and forests. "The life sparkling within us all, too small to see with the eye alone. But! Seeing is not understanding! Having inspected the Lessers I eat, before I eat them--but after I use my magic--I have learned to correlate ill health with infection, strong health with a balanced field of internal life--it is fascinating! Truly fascinating." He leaned in, feathers fluffed up with excitement. "Through these methods I have learned to set a broken bone without the need for a chrysalis," and ahh, that had come with trial and error. "The appearance and function of some internal organs... and the symptoms of their dysfunction! The treatment of burns and wounds, and infection--infection is sinister," he went on, now pacing again, a tut-tut click of his beak accompanying a grimly shaking head. "Even a minor wound can be fatal without the proper cleansing, treatment! It--ahh, oh, I do not want to bore you with too many details. There are many things I have learned and it would take weeks to explain them all in detail." He stopped, turning to Luna again, once more brightening. "But! At least with the chrysalis, I can show you an answer."
Doctor paused, leaning his head down and lifting up a long-taloned foot (those claws were huge, hooked, and wicked--but he was delicate with their use). Carefully, he pulled down the goggles a little, to display strange button-shaped 'eyes' of his gemstone beneath. There were no true eyes to be seen. "A little mishap some time back," he explained. "The stone, for whatever reason--guided, I think, by another creature's magic--exchanged my eyes for these. The goggles give me sight again. Of a sort." He pulled them carefully back on, tugging them into place, and settled to peer happily at Luna. (Oh, an audience! -A companion!)
"So! Tell me--what do you think? If you have not considered your morality before--perhaps do so now? I would so love to hear, to listen, to your thoughts on it! Your process, your conclusions-!" He had a hopeful tone as he settled in, as though he wanted nothing more than to hear Luna return his speeches in kind.