IMHA is a life-threatening immune system disorder causing rapid destruction of red blood cells in dogs, requiring emergency hospitalization and intensive monitoring during a critical treatment window.
IMHA causes acute, rapidly progressing suffering from severe anemia: profound weakness, labored breathing, and rapid heart rate as oxygen delivery fails. Dogs can be playing normally one day and in critical condition requiring ICU-level care the next. The welfare intensity of the acute crisis is matched by the prolonged treatment phase - weeks of immunosuppressive therapy with side effects, repeated blood counts, and the anxiety of monitoring for relapse. Survivors may require months of tapering medication, making IMHA one of the most demanding welfare management conditions in companion animals.