Rats can eat chocolate in small doses as an occasional treat. But, too much chocolate at once can cause poisoning in rats because of the chemical theobromine. Chocolate is also very sugary.

Do mice eat chocolate?

Although it is commonly believed that mice are attracted to cheese, they tend to prefer foods that are higher in carbohydrates. Chocolate may be more effective attractant for mice than cheese. However, house mice are indiscriminate and will consume any food source available to them.

Can mice smell chocolate?

Contrary to popular belief, mice are more attracted to the scent of chocolate than the more traditional mouse-bait cheese, or other aromas like vanilla essence, according to Sorex Ltd, a manufacturer of rodent control products based in Cheshire, UK.