Hey! I would like to suggest to make pastries works similar as pumpkins and other collectables. (Pumpkins were without this ability untill 2017 Morostide as well) There is no info on item page about if pastry already is in your collection or not. It would be fine, if it is showing (like on wearables "Already in your wardrobe"). (I already have full pastry collection, but it could help other guys :D I welcome to make this for already read books as well)

This isn't really necessary for books I guess, because once you've read a book to your pet then that pet's name will no longer appear as an option if you have the book in your inventory again.

It would be nice to have this for the pastries though, I never noticed that it wasn't like that already.

Yeah, but when you have many many pets, its pretty hard to check all list if one you want to read book already have this read or nope :D