I am not sure if this is possible or not, but this can be good for those that want to give the pets away to their friends or donate to pounds.
Selecting so many pets can take hours upon hours depending on how many pets you have!
So I suggest on adding a Mass Selection in trading, to make it more easier for people to donate their pets faster to the pound (if they are donating a massive amount or all of their pets), or to make it easier for those who are doing massive trades.
I am a lil bit aware that there could be loose ends on this, like accidentally getting that pet selected, luckily that can be kind of arranged(?).
What do y'all think?