The Chartreux is an internationally recognize breed of domestic cat from France. The Chartreux is large and muscular, with short fine-boned limbs, big paws, and very fast reflexes. They have been described as "potatoes on toothpicks". They are known for their blue (grey) water-resistant short hair double-coats and gold- or copper-colored eyes. Chartreux cats are also known for their "smile"; due to the structure of their heads and their long, tapered muzzle, they often appear to be smiling. Chartreux are exceptional hunters and were highly prized by farmers. Patellar luxation is a common weakness in the breed which responsible breeders screen for.