Use shallow bowls or disposable food lids. Make sure you use something you don't mind throwing away and then add instant potato flakes to them. Set them where you've seen evidence of rats so that the potato flakes will be right in their path. Make sure to put at least 1/2 cup (50 g) in each bowl so the rats will really chow down. For this to work well, they need to drink water after consuming the potato flakes. Typically, they're pretty good at finding water on their own, but you can also set out small bowls of water near the potato flakes. Rats are drawn to the food, so they'll come chow down on the dried flakes. Then, when they drink water, the subsequent bloating will eventually cause their deaths. Check on the bowls once a day at least. If they're not being eaten, you may need to move the bowls elsewhere. Alternatively, try adding 1-2 spoonfuls of sugar to the mix to make the food more enticing.

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