A cat and three mice are shown together. One mouse gives the holy communion host to another.  But the host is also given to someone about to die. The middle mouse may well be receiving last rites, unless the cat heeds the advice of the mouse on its shoulder, urging he cat  to spare its victim.  A bird on the shoulder of a prophet is conventionally used to signify divine inspiration. Here, the mouse on top of the cat may have been intended to represent something similar