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Rats are helpful because they are small, intelligent animals.

How they are helpful can vary. Some people can't have cats or dogs, might not like fish, & mice smell a lot, so rats may be their only option, or the best one.

The African? Pouched Rat is a good example of the genus. They're being trained to detect/find land mines. Because they're so light, weighing about 600grams to 1 kilo, they don't trigger it, & sit right on it.

You can Google that too

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15y ago

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