Petting Zoo is a Pet Battles achievement under Collect to obtain 100 unique companion pets.
Contents
After completing this achievement, Breanni will mail you 
[Nuts' Acorn]:
I'm Going Nuts!
Hello again, Friend!
This mischievous little fellow is driving everyone in the pet store nuts!
I thought that perhaps you might take him along on some of your adventures... perhaps he'll calm down after he's seen a bit of the world.
You DO wear a helmet, right...?
--Breanni
Series
[Can I Keep Him?]- [Plenty of Pets]
- [Plethora of Pets]
- [Shop Smart, Shop Pet...Smart]
- [Lil' Game Hunter]
- [Petting Zoo]
- [Menagerie]
- [Littlest Pet Shop]
- [Going to Need More Leashes]
- [That's a Lot of Pet Food]
- [So. Many. Pets.]
- [Pet Emporium]
- [Master of Minions]
Patch changes
- Patch 4.2.0 (2011-06-28): Now rewards [Nuts' Acorn].
- Patch 4.1.0 (2011-04-26): Added.
