The brown rat is an omnivorous scavenger, and it doesn't seem to care at all whether its food is fresh or spoiled. It will eat soap, oil paints, shoe leather, the bone of a bone-handled knife, the glue in a book binding, and the rubber in the insulation of telephone and electric wires. It can go for days without food, and it can obtain sufficient water by licking condensed moisture off metallic surfaces. All rats are vandals, but the brown rat is the most ruthless . . . Instead of completely eating a few potatoes, it takes a bite or two out of dozens. It will methodically ruin all the apples and pears in a grocery in a night. To get a small quantity of nesting material it will cut great quantities of garments, rugs, upholstery, and books to tatters. In warehouses, it sometimes goes berserk . . .
Compared with their wild relatives, laboratory house mice are real wimps—slower, weaker, and less active.
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The greater strength of wild mice makes it impossible to subject them to some behavioral tests designed for the comparatively feeble lab mice. For instance, a standard test of muscle endurance is called the cord drop. The test is quite simple: a mouse is dangled from a taut cord by its front feet—your basic pull-up position—and scored according to how many seconds it can hang on before dropping to the ground. A robust young laboratory mouse is doing well to hang on for thirty or forty seconds. When we tried this test with our wild mice, they simply pulled themselves up onto the top of the cord and walked off. We didn’t actually see them sneer with contempt, but they may have.
‘What you got in there?’ a man asked. ‘A rat?’
‘Of course,’ Colin said.
‘What’re you going to do with it?’
‘I’m going to beat it to death with this iron rod.’
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posted by GriffX at 11:33 AM on April 1, 2005