(snip)
The way I see it, this here is so much of the problem. Mice are fluffy and cute (don't even mention the bunnies!). What others don't see is that mice are genetically programmed to live about a year or so (?). Rats get maybe three. From everything I've seen on the net, pet mice and rats that are allowed to live out their "natural" lifespans almost invariably die of tumours - frequently horrific and grotesque tumours.
Death by snake is actually more humane.