I think the worst one was a lab mix named Diamond. He was hit by a car. His injuries were not really that bad, but both back legs were broken and the owner couldn't afford surgery and the vet said it probably wouldn't work. He was as lively as ever, besides the fact that he couldn't walk, his tail was wagging and he was being his usual happy to see everyone self. He had boarded not long before so I knew him quite well. It was so hard to see the owner so distraught.