The problem with rats
Rodents love to gnaw, especially rats. The reason for this is their two front incisors never stop growing, so without gnawing away at different materials they could not keep those teeth at an acceptable size to eat and groom themselves. The incisors have a very hard enamel coating, this allows them to chew through even hard materials such as lead, aluminium, and soft concrete. The gnawing habit can cause damage to internal wiring of homes and businesses, which could be a potential fire risk, or cut off the power to light and electrics.
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