Welcome to your new home, Ilona!
anyway, just wanted to put this out here! there is a way to stop the depressing messages you get sent when you try to trade a pet you got from the pound.
I'll put it down below!
1. Go to your PMs, then the "Rules, Folders, Settings" tab.
2. Go to add new rule, and select "Sender", then hit next.
3. Select "is", then hit Next.
4. Type your username, then hit next.
5. Select "delete", then hit next.
People have probably already figured this out but it's here!