Cat Hypervitaminosis A from Raw Liver Diets

Hypervitaminosis A is a preventable but serious nutritional disease in cats caused by excessive liver feeding, leading to painful skeletal deformities that develop over months to years.

Key Facts

Cats fed diets predominantly consisting of raw liver can develop toxic vitamin A levels
Excess vitamin A causes bony proliferation especially around the cervical vertebrae
Affected cats develop a characteristic hunched posture and reluctance to move the neck
Pain causes severe reduction in normal activities including grooming and playing
The condition is progressive and irreversible if dietary correction is delayed
Diagnosis requires radiography showing characteristic spinal changes
Removing liver from the diet prevents further progression but cannot reverse existing damage
Liver should not comprise more than 10-15% of a cat's raw diet

Welfare Considerations

Hypervitaminosis A causes chronic, progressive musculoskeletal pain that owners often misinterpret as normal aging changes. Cats develop increasingly rigid spines and may become unable to groom themselves or adopt normal resting positions. The pain is constant and worsening. The tragedy is that this condition is entirely preventable through proper dietary formulation. Raw feeding communities must share clear guidance about safe liver proportions.

What You Can Do

Never feed cats diets based primarily on raw liver
Limit liver to no more than 10-15% of the total diet
Use balanced commercial raw diets formulated to AAFCO or FEDIAF standards
If your cat shows neck stiffness or reduced mobility, request X-rays from your vet
Share dietary safety information with raw feeding communities