A bantam version of the breed, the Crested Miniature, was bred by John Hall and Roy Sutcliffe in the United Kingdom in the late twentieth century; it was recognised in 1997. The crested gene is very popular in Europe, resulting in crested versions of most breeds. Though Cresteds can be good layers and strong roasting qualities, the main interest and demand for the breed is as pets and decorations. They are not a popular show breed due to challenges associated with the crest. The crest often causes the ducks to bear a fat body in the skull. Depending on the fat body's size and relative position to the brain, it can impede a duck’s mobility. Many crested ducks experience a tottered walking pattern and if knocked over are unable to get up. Other issues caused by the fat body may include seizures, neurological problems, and even early death.