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Chickens can eat some of the insects scorpions prey on for food. As such, they'll make the area less inviting to scorpions.  Keep in mind that scorpions are nocturnal and chickens are not, so chickens won't have much opportunity to hunt scorpions themselves. This natural substance is made from ground up fossils. It's a fine white powder that can be sprinkled in doorways, cracks and crevices both indoors and outdoors. It's completely safe for humans and pets to be around, but the tiny shards of fossil effectively pierce scorpions' exoskeletons when they happen to scuttle over the powder. Diatomaceous earth also kills spiders, roaches and other insects. The same traps that can be used to get rid of mice or roaches work for scorpions, too. Set them up in dark corners and near sources of water. If you catch a scorpion, throw the trap away and set out another one in the same area, since it's likely a spot that more scorpions will be attracted to.
Install a chicken coop. Try diatomaceous earth. Set out sticky traps.