Hello! I think it would be much easier if i could release lot of pets at once, instead of one by one. Because i have a lot of pets that i dont want, and its really annoying that i have to click them one by one. Even more if i have bad wifi day. I hope you can change this!
Snowystream

I actually suggested this a while back and got a response from Krin. They said this feature will be added eventually, but not anytime soon sadly. It takes a lot to code in and since it's not a feature that's need or highly requested, it's not very high on Krin's list of things to work on.

Hi! I know Krin has plans to eventually get to a mass release option, however in the meantime Tigress has a Sylestia Extension for making releasing easier by autofilling the name of the pet in for you so you just have to confirm. It's not a full on mass release, but definitely a good compromise for the meantime ^^