This just in from Professor Greyrose:
"I know many of you were looking for information on some pets that have appeared lately, seemingly out of nowhere, and I wanted you to have this as our response:
It seems as if the gate on the holding pen swung open & a stampede through the Spiral has occurred. We were trying to hold some of the pets back as holiday treats, but they were too anxious to make an appearance and escaped into the world. Enjoy!"
Let the hunt begin!