On a recent rete discussion, the topic of whether small animal guillotines had been collected at any of the various collections of scientific and medical instruments.  This was raised because one had been recently been added to the collection at the University of Copenhagen.  One would not expect them to be common, but it appears that they were/are still very wide-spread.  There is one at the Smithsonian and in many other collections, according to the responses on the list.

This message also garnered a bunch of responses, including some very interesting ones from actual users of similar equipment … including how to instantly kill a small animal by whacking it against the edge of a table.

Just in case anyone was wondering, they are still available for purchase.