That reminds me of a show I saw on animal planet about a woman who rescues retired greyhounds. She talked about the extensive process of introducing the dogs to different textured floors, grass, carpet, everything! It is quite an extensive process when a dog has been raised in a kennel. I have had a few fosters myself who were scared of the world because of growing up in similar circumstances. It is almost a full time job to try to socialize them to the world when they are past their critical socialization period.