For animals eating feet, maybe one of the girls gets her feet cut off and they are given to an animal to eat? Or maybe the animal gets to eat her feet alive? It could be a fourth girl too while the other three girls are forced to watch before their own feet are amputated to be played with and eaten by people.

Also for amputation, what kind of device? Slow amputation with hacksaw? Quick amputation with cleaver or guillotine device? Medium amputation with serrated knife? Maybe different blades are used for different girls depending on their crime to stretch out their suffering as their feet are cut off? Maybe some get toes cut off one by one?