Think animals like to stick to their own species when they hang out? WRONG! This video is heartwarming proof that animal friendships happen all across the spectrum. Even animals we thought were mortal enemies, like birds and cats, are getting on here. Some just clearly like to hang out for laughs, while others, like the rescue animals Penny the chicken and Roo the dog, genuinely support each other like a brother and sister. We can't help but feel that the tortoise might be getting used for free rides though!