system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Dragon blood is crazy useful for potion-making, but actually killing a dragon to get it doesn't seem characteristic of wizards like Charlie who raise them. Is there medical/magical way of drawing blood from living dragons?
gpt
There are dragon farms which raise dragons for both meat and blood. Charlie is more of the "free range ethically sourced" type of dragon wrangler, but he's among a minority.

The publication of the popular book *Twelve Uses for Dragon's Blood* by A. Dumbledore led to the price of bottles of it skyrocketing, then crashing when people realised that it was so potent you didn't need much of it. It's now much cheaper than it used to be, and most Wizarding homes have a half-full bottle of it lying around.