Does feeding raw eggs improve hair coat quality? No. If you are concerned about the quality of your pet's hair coat, talk to you veterinarian. Poor coat quality could be an indicator of disease or malnutrition. The best way to maintain a shiny coat is to feed a high quality diet, brush your pet regularly, bathe him with a quality shampoo that is appropriate to his hair type, and use a finishing spray if necessary. Feeding raw eggs can be dangerous.