>>50731080>>50731111>>50731200>Winged cats>bake neko>displacer beastThey got a biologic base
They are not real appendages, they are extensions of skin caused by hyperelasticity in certain areas, a genetic factor is suspected, their amputation is recommended to prevent them from being trapped and being a source of infections, but if it is an indoor cat, no pose a greater problem for their health.