Zacharias followed his gaze about the room for a brief moment - and then realized that Theodore was once talking about actual thestrals. And while he wouldn't have been able to tell if one was standing right next to them, he figured there probably weren't any in St. Mungo's. "Well, you have the toy for now. Until you see the real ones again."
What kind of place where they running here? He wanted to scowl at someone. Or use rude words. He had a whole lot of them in his vocabulary. An entire section that was dedicates to insults, in fact. He'd been practicing them since he was a very young child, after all!
"Well then, you can give it a name in secret. But not tell anyone else. Only you'll know his name. So then it won't be problem," he suggested.