The Barbarian and His Dog

When The Barbarian and His Dog enters the battlefield, create one of these;
•A 4/2 Vigilant Pup token
•A 1/4 Wary Pup token
•A 3/3 Happy Pup token
Only one of these tokens can be on the field at
a time.
{3}{r/w}: Create a Vigilant Pup, Wary Pup, or
Happy Pup token.