Alright ladies and gents, as @Sirrian’s illegitimate Son. I feel confident in speaking for him even if I’m way off based.
Here are all the current cosmetic pets:
Freedom will be available every year during a 24 hour pet rescue during the week of July 4th.
An anniversary pet will be available every year during a 24 hour pet rescue. Tiny Torte will be available in a gem shop.
Dragonkitty will be available every year but no set date during a 24 hour pet rescue.
Corgi will be available every year during a 24 hour pet rescue during the week of international pet day.
Skullbeak will be available every year during a 24 hour pet rescue during the week of … pirate day.
A holiday pet will be available every year during a 24 hour pet rescue. Prancer will be available in a gem shop.
Doll will be available every year during a 24 hour pet rescue during the week of Halloween.
A lunar pet will be available every year during a 24 hour pet rescue. Hoglet will be available in a gem shop.
Every year there will be brand new customers to sink gems into cosmetic pets. It doesn’t make sense to think that they will be one and done. It’s possible that they will be available for cash instead of gems. But I promise you all, they will not be exclusive to the first 24 hour pet rescue.