Alright, can't find my answer so far and I wanted confirmation before I bought one because zapping's been a bust for me but-

Does the Miracle Potion II include experiment pets as part of the species change feature?

Yes, according to another thread:

Retire Some Experiments?

Warning: make sure the pet you want to make an experiment is common color first before you use Miracle Potion II on it.

That can be done with

Thanks!! And thankfully don't have to worry about common- he's currently a different experiment from the zapper.