A good idea for a startup might be a pet shop where you can buy all kinds of weird genetically altered mice! Or custom order!

Heh Heh Heh. There's even "optically transparent" mice:

https://www.jax.org/news-and-insights/2014/august/transparen...

"We're not sure what's eating our fields, but it smells like rats...!"

Thank God! Finally, mice you can't see!

and then we can have pets stuck forever at shelters!

... :( I'll see myself out.

If it's your pet I'd guess you don't need the unironically? Anyway - new word for me!

I don't think it's the correct word here though, given the meaning of the word; people similarly mix up jealousy and envy.

Just get the right turtle or parrot? Mammals might be more difficult, though.