Yes and no. Red and Yellow dyes cause cancer in mice. Blue dye can heal spinal injuries.
Rats, mice, small rodents
No, Marshmallows will not kill mice.
mice
No, you should not dye your hummingbird food. This dye can harm the birds. It is true that hummingbirds are attracted to red. You can hang red ribbons on your feeders to initially attract them instead.
Sulphur can kill mice and rats because it is toxic to them.
Some foods that will kill mice are caramel, peanut butter, and foods very high in sugar content.
Mine did
Mice, rabbits, dogs
Yes, it is true. House mice would not be used to finding food and water themselves and the wild rats might kill them for their food.
blue
Yes with food dye.
Brown. you'll kill it.