In dwarf fortress you can have dragons as pets. Never got there, tho I think I will train dogs in my current fortress.
Sadly not known to breathe fire, but on the plus side, less likely to burn your house down: https://en.wikipedia.org/wiki/Pogona
alt Hacker News
Sadly not known to breathe fire, but on the plus side, less likely to burn your house down: https://en.wikipedia.org/wiki/Pogona