LibPetJournal-1.0

local LibPetJournal = LibStub("LibPetJournal-1.0")
local function ScanPets(event, petjournal)
    for i,pet in pairs(petjournal.Pets) do 
        if pet.name == "Feline Familiar" then
            print("A cat in a hat was found.")
        end
    end
end
LibPetJournal:RegisterCallback("PetsUpdated", ScanPets)
ScanPets(nil, LibPetJournal)