In either case, their owners may have fallen in love with them before realizing that it takes some extra effort to care for a dog with wrinkly skin. (happytailsspa-blog.com)
The genes that account for wrinkly skin are on chromosome 13 of dogs. (2ndchance.info)
Every time he needed a diaper change or an outfit changed, he cried as soon as the air hit his little wrinkly skin. (romper.com)