Is there any pet colour or a species that you can't get through the zapper?

I believe you cannot zap for Angelic or Hydrus, but as far as I know everything else is zap-able. I thought perhaps Neela were off limits, but according to a thread on here from a little while back "special" pets like the Neela, Bumbus, and Bakhoru are rare but possible. Good luck! :)

Thanks :)