I got asked if pets can be friends with other pets on the site. There isn't actually an option for this, is there?

Yup, they can. You can access them by going to the pets page, clicking on the dropdown arrow next to your pet and clicking 'Friends' or via this link (using your pet's ID): https://subeta.net/pet_friends.php?petid=PETIDHERE

Thanks, I added some friends just now. :) This is so cool. Okay, this thread can be locked now. ^-^

You're welcome. xD Enjoy!