Companion Animal Welfare

Cat Immune-Mediated Haemolytic Anaemia Welfare

Immune-mediated haemolytic anaemia (IMHA) in cats causes rapid, life-threatening red blood cell destruction that requires emergency treatment and long-term immunosuppressive management.

Key Facts

Feline IMHA is less common than in dogs but causes rapid life-threatening anaemia
Signs include pale or yellow gums, lethargy, rapid breathing and collapse
Blood transfusion provides emergency stabilisation while immunosuppression takes effect
Prednisolone is the primary immunosuppressive drug, with chlorambucil added for refractory cases
Some cases are triggered by haemoparasites including Mycoplasma haemofelis

Welfare Considerations

IMHA causes acute welfare crisis as the immune system destroys red blood cells faster than they can be replaced. Affected cats deteriorate rapidly from lethargy to collapse. Emergency transfusion and immunosuppression save many cats, but intensive monitoring and long-term medication are required. Quality of life assessment throughout treatment guides decisions about continuing or changing therapy.

What You Can Do

Seek emergency veterinary care immediately if your cat shows pallor or collapse
Ensure careful monitoring during immunosuppressive treatment for side effects
Support blood donor cat programmes at veterinary teaching hospitals