Hi there,
Store pets do not count towards complete collections and do not have the check mark or cross next to them when sorting by month/species. They also have a separate tab within the archives.
It has been emphasized that store pets are considered fun additions to collections, and are not considered part of a complete collection, thus they will not be re-released. Store items are treated the same way - with the exception of giveaways, they are not re-released.
However, store items DO count towards a complete item collection, are not separated by tab, and are lumped in under generic month categories.
My suggestion:
Store items should be treated the same as store pets.
They should have their own tab within item archives.
They should not count towards complete collections.