Feeding excessive liver to cats causes Vitamin A toxicity resulting in severe skeletal deformities and chronic pain in affected animals.
Hypervitaminosis A from excessive liver feeding causes progressive, irreversible skeletal disease that causes chronic debilitating pain. Affected cats develop fusion of cervical vertebrae and periarticular bony growths that severely restrict neck movement and cause constant pain with any attempt at normal head movement. Cats are unable to groom their heads, may have difficulty eating, and show obvious pain on palpation. The condition is particularly insidious because it develops slowly over months before clinical signs are apparent, by which time irreversible damage has occurred. The condition is entirely preventable by avoiding excess liver feeding. Raw feeding advocates must understand that cat-specific nutritional constraints, including Vitamin A metabolism differences from dogs, make raw diet formulation genuinely complex and professionally guided.