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Labrador Retrievers are a popular dog breed in many countries. There are three recognised colours, black, chocolate, and yellow, [1] that result from the interplay among genes that direct production and expression of two pigments, eumelanin (brown or black pigment) and pheomelanin (yellow to red pigment), in the fur and skin of the dog.
Ensuring optimal energy intake allows the diet to meet the high energy demands of puppies while avoiding over nutrition, over-accelerated growth, and unhealthy weight gain. Dietary fats also help to meet these high energy demands and provide the essential fatty acids necessary for brain, neuron, and retinal development and function.
Dog fur is colored by two types of melanin: eumelanin (brownish-black) and phaeomelanin (reddish-yellow). A melanocyte can be signaled to produce either color of melanin. Dog coat colors are from patterns of: Eumelanin — black, chocolate brown, grey or taupe pigment;
Studies indicate that dogs given a whole-food diet when young have fewer yeast infections in the ears and that the incidence of ear infections may decrease as the dogs become older (1).
Every dog has two alleles - one from the sire and one from the dam. The gene expression depends on the genotype: Heredity diagram Left: black eumelanin, right: brown eumelanin. DD: Both sire and dam have inherited the wild type allele. The coat is not lightened. Dd: Either sire or dam have inherited the allele for dilution.
Dogs get ample correct nutrition from their natural, normal diet; wild and feral dogs can usually get all the nutrients needed from a diet of whole prey and raw meat. In addition, a human diet is not ideal for a dog: the concept of a "balanced" diet for a facultative carnivore like a dog is not the same as in an omnivorous human. Dogs will ...