Leonardo da Vinci is forever linked to his famous Mona Lisa, and this Leonardo is bonded to his best friend Louise! At least nine years old, Leonardo and seven-year-old Louise, both Boxer mixes, were surrendered by their family to the Aiken County Animal Shelter in South Carolina in early July. No reason for their surrender was given. The dogs were at grave risk at this high-kill rural shelter. It didn't help that they were older dogs, larger dogs and both heartworm positive. It would be difficult enough to find a rescue for either of one them, let alone for both of them to stay together.