Even though there isn't a pet shop in Grizzleheim, there are however, Grizzleheim related pets. For example, the Walgreens Wizard101 gift card gives you a wild claw pet. And one of the pets you can buy with your arena tickets in the Pet Pavillion is a Boar. And I'm sure there's even MORE Grizzleheim pets out there! I hope this helped!
the ancients " ravens" drop the wildback silverclaw, in hall of valor the silver colossus, zombie, life bat and death troll are dropped throughout various bosses... in helgrind warren the life monitor is dropped the nightwing in ravenscar drops the ice bird and the barrier demon drops the fire bats