The Hairy Costume was a part of the Hairy Gold Account Upgrade. See the costume here.[Rarity 29] 
Chibs hairy
This costume is retired and no longer available, meaning that the account upgrade has expired, but you can still get it from the Weekly Quest Challenge
Hairy costume

Get this avatar by using a hairy costume on your pet.

Costume hairy
Hairy easter egg

The Easter egg

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.