Hmm, looks like the usual 'graveyard' around here, too. So many little mousies have given their furry lives for the entertainment of our furkids.

Archy has always been a 'mouser'. Binky, not so much; he prefers toys with 'tufts' on them. However, when one of Archy's mice had little feathers on the end, he suddenly was extremely interested and has been playing like a kitten!

I doubt if you will nab the culprit...looks like a 'gang' effort to me!