There's a series of 3 minute anime episodes called Chi's Sweet Home. It's about a cat who lost his mom, got found by a little boy and, though enjoying the life of a stay at home cat, still wants to become re-joined with it's family.
Though this kind of show usually isn't my thing, it is my wife's. I promised I'd watch one... then another. Then I promised I'd just watch upto episode 8... which turned to 12 or 13, I don't remmeber, I lost count. Only 3 minutes long each, they go by fast.
enjoy the first episode