[She has to actually consider that.] No, I don't think so. Olivander's reputable. I never got to ask, but I'm fairly sure that those items are procured in the most humane way.

[And just to carry on in this tangent, she rambles:] Phoenixes are very rare, for example, but the benefit of them is that before the go through the end of a cycle, to burn and be reborn for their own ashes, they shed feathers. So it would be enough to just pick those from the ground, really. And unicorns, they don't really let just about anyone near them so I imagine that somewhere out there, maybe there's a reservation where they brush their manes and sell whatever falls painlessly?

[For the dragon, though, she pauses. Her own wand was made of dragon heartstring, a very good conductor of charms, and especially. Bellatrix's, too, which might be why she can use it - even if the wood is wrong. Shape is also wrong.]

I don't know how they source the last ingredient, but I want to believe that it's only when a dragon reaches old age and expires on the reservation. Plus, dragon hearts are likely the size of a human being, so I'm sure one is enough to create enough wands for a century?

[Pure conjecture.]