Cashew, a yellow Labrador Retriever, gradually went blind and deaf. As it became more difficult for Cashew to get around, Libby, an orange tabby cat, started to help Cashew more and more. Libby would lead Cashew to the food dish, guide the dog around obstacles and tag along on walks to keep her friend safe. The two would sleep together and Libby would watch over Cashew.How many tests of intelligence and self-awareness has Libby cleared with her behavior? Altruism is obvious, often claimed to be a higher human-only trait. Not to belittle wonderful Libby's help for her friend, but there are many other similar stories out there that people need to pay attention to.
You can read more about Libby and Cashew at the ASPCA blog and at a newspaper site, The Daily Item.