I can't remember if I've suggested this before-- I remember thinking about posting it for a long time, but can't recall whether or not I actually have. x3
Anyhow, my suggestion was:
-- Add a button to the wishlist (where, exactly, is arbitrary) that allows you to 'add all pets missing' to the wishlist, which basically adds to your wishlist any pet that you have neither in your collection nor in your wishlist already.
It would be super-helpful to me and I'm sure many other members, so we won't have to search through the entire 100+ pages (I think, counting there's 2.5ish years, 12 months per year, 3ish pages per month, +holidays) to add any pets we might have accidentally traded and are now missing.
Feel free to debate this/change it around/shoot it down. x3
Thanks for reading!! <3
-Feather