Animals are PURE. Their souls are pure. Their souls help us humans. Alas, it is we, humankind, which need to learn, re-learn compassion when we pass on above and have to justify our actions for reincarnation to better ourselves. *But*, I do believe an animal may reincarnate to help those humans on earth. Especially, those humans whom have lost a pet earlier, to help heal their (human) heart.