Thrianta The Thrianta is a bright red rabbit with fawn coloring under its paws and tail. The fur is soft, dense and medium in length. Adult weight for this breed is 4 to 6 pounds. Originating in the Netherlands, the Thriantas were further developed in Germany before being imported into the United Kingdom in the early 1980s. During the 1990s, the breed arrived in the United States from both the Netherlands and England.