Hi! My suggestion would be for when we click a item such as a squishy or food item while we have a pet selected, that it will notify us if our pet has already used it. That way we don't have to look to the master list to see which ones our pet is missing or hasn't tried or played with! :)
I think it'd be awesome if I could click lets say, jelly ghost and it'll tell me "cinderdragon has not tried this yet!"