This reminds me of old cartoons where people would be so hungry they start hallucinating like this .. to which the macabre situations would ensue of the parties finding themselves covered in mustard or bread or such, sometimes being munched on.
Guess that cheese was good enough to send Mr Sniffy to the next life. A humane mouse trap would have just meant to release the little one outdoors after catching.
Rescue any animal that needs a home, or at least some help and care. Spread the love.