They're from different Monthly Collections! For example, the Cat Carrier is from the October 2011 collection. You get it from transforming it from the Dog Kennel (like the desc mentions). When we did the cat/dog items, we switched every month as to what would show up in the collection and what you had to transform to. One month the dog would show (and you switch it to the cat) and another it'd be a cat that you'd transform to a dog!