But this could be easily fixed! I suggest that on each pet's profile, we add a button - "View this pet in the archives," with a link to the page on which the pet is found. This will help with rereleases especially, but also an easy way to find what litters pets come from, etc.
Don't understand what I mean?
Here's a picture to show you what I'm suggesting ^^
(it's a bit too big, link to full pic)

I think this would be really helpful to everyone who is trading rereleases - and it will help stop the confusion of getting scammed out of pets who are of more value than you might think.