We adopted Chad from the shelter as a pup. He was fine then and had a normal first 4 years. He than developed a type of Glaucoma that, despite treatment, rendered him blind. At that piont his eyes were still very painful, so we had to have them enucleated. He knows the house and his yard like the back of his paw. He still chases the squirrells with our other dog, Brian who is a Katrina rescue and is deaf. The take great care of each other and are an inspiration to us daily.