I have also tried to enter a world and create a new family to move in and add the pet form library then, instead of starting a new game from the menu and it seems to work, even though it is a many steps process compared to just choosing 'new game' from the menu. I have tried painting the pet and it 'solves' the problem, but erases any custom texture/painting and reverts it to the default one before all the customization. I've been having this problem when placing pets/families with pets, either in 'create a sim' or in a lot, from the library and they become pitch black. Information, Guides and Announcements for the EA app.