you can't
You have to use the Mutagen chemical on it and it will mutate. Be careful, too many doses of it will kill the lab rat!
the lab rat
To craft other foods.
you basically mutate the rat simple as that
go to experiment or exp click the irradiator then hold it, do it to long and his head will blow up!
Funky Lab Rat happened in 2010.
Funky Lab Rat was created on 2010-11-24.
death
lab rat
Funky Lab Rat - 2010 VG was released on: USA: 24 November 2010
Test tubes and lab rat cages.
Knight + dragon= dragon rider Rat + Ninja= Ninja rat Reaper + Cerberus= death night