Too cute! And VERY runty! I'm pulling for this little guy!
Like OakRidgeRabbits said, non-dwarf-gene carriers of these breeds also exist. They frequently are breeding stock, or are sold out to pet homes. Our bunny Frida was once a breeder's bunny (by the tattoo in her ear) and we think she is a non-dwarf netherland dwarf (also called a big ugly doe (or buck)). She was probably a pet at one time, although we'll never know her whole story as she came in to the humane society as a stray. At the shelter, we get a lot of surrenders that are big dwarf breeds, since they have been re-homed in pet homes and the people sometimes give them up. Benjamin is a true dwarf nethie, so we don't know how he ended up in a shelter.