So I have a singleton foster kitty (pretty sure she's a foster failure). She is 5 weeks old and is starting to get really playful, explore things (my hubby) with her teeth etc. What do I need to do to ensure she grows up to be a good kitty? She had littermates up until 4 weeks old, when she was brought in to the vet I work for almost dead. She is a tiny little mite of a thing (10oz), and is super tiny for her age.