This is basically the
"Rhinos are just fat unicorns" approach. Totally fine if you want to go that route but a bit goofy. You can get SOTA models to generate a 5-legged dog simply by being more specific about the
placement of the fifth leg.
https://imgur.com/a/jNj98Pc
Asymmetry is as hard for AI models as it is for evolution to "prompt for" but they're getting better at it.