Mix baking soda + flour + sugar at equal ratios 1:1:1. Mix thoroughly dry. Mix the flour, sugar and baking soda in equal ratio of 1:1:1 By that I mean, u can add 100g of each in the mix. Mix properly and put in the small containers u just created. Place these containers at dark places close to the wall, close to edges or the store where u keep ur feeds Rats love flour and so will go for it. Secondly, the ‘bomb’ is sweet due to the sugar. Thirdly, baking soda has a funny taste that makes the rodent eat more Now this is how it works. Baking soda will react with the acid in the stomach of the rodents to create carbon dioxide. Unfortunately rats and mice can’t burp or fart it out. This inability will lead to their death. Because the inability and internal blockage will cause ruptures, which consequently will lead to their death Sometimes, to make it very irresistible to rodents, u add a little peanut butter to the mix and add some more baking soda.