if a dog is liver or not. Liver will also dilute a dog's brown eyes to amber/yellow. It is also possible for a dog to be a Liver, and not appear brown. A dog that is recessive red cannot produce eumelanin (black) pigment in their fur. Since Liver is a dilution of black pigment, a recessive red Liver dog will appear to be a shade of Red, Yellow, or Cream depending on the intensity of the dog's phaeomelanin (red) pigment. A recessive red Liver will still be born with a Liver nose and amber/yellow eyes. It is common for the nose of any recessive red dog to fade to pink as they grow older. Livers, like any dog, can also be covered with varying amounts of white which will hide the color of the fur. Liver chestnut in horses In horses, liver chestnut is a chocolate-colored chestnut horse. A dark liver chestnut has the same recessive base genetics as a regular chestnut, but the shade is a dark brown rather than the reddish or rust color more typical of chestnut. A horse that appears to be a dark liver chestnut but has a flaxen-colored mane and tail, sometimes colloquially though incorrectly called a "chocolate palomino", could be genetically chestnut but could also be a black horse manifesting the silver dapple gene. Silver dapple is a dilution gene that acts in a manner similar to the liver dilution in dogs. The darkest liver chestnuts may be confused for black, but such horses are distinguished from other phenotypes by the absence of black hairs, and obviously brown or reddish legs, muzzles, flanks and other "soft" areas. The genotypes that determine specific varieties of chestnut are not known, but the genetics that darken the coat may have a recessive mode of inheritance. The sooty gene may also be one factor in creating the darker color, though sooty coloration is generally not evenly distributed throughout the coat. Genetic testing can distinguish a chestnut from a black or a bay horse. Other dilution genes in horses analogous to those creating dilution shades in dogs do not create a liver color in horses. These include the dun gene, which produces a tan-colored or "blue"/gray solid colored coat and the champagne gene which tends to lighten the coat more than the mane or tail. Liver (organ) This is the color of a healthy human liver. It may