One issue with Pet is that there will be more and more of them, and so it will be more and more difficult to catch one that we don’t have maxed .
So here the idea: propose 3 choices a la Arena.
For that, the Pet rescue should be changed from Rescue Pet X (ex. Rescue Auraio) to Rescue X color Pet (ex. Rescue a Green Pet).
So when a guildie gets a Pet Gnome and kill him, the guild gets a Rescue Event where they can choose which pet from 3 choices they want to rescue.
One very optimistic player could hope that the choices will be only the Pets that she/he has not yet maxed, but it seems too great to be added like that .