Anorexia can cause kidney damage, malfunction, and even potentially kidney failure. A lack of proper nutrients can put strain on the kidneys, as can excessive weight loss. A lack of protective muscle...
Rats consume and contaminate food, damage containers and packaging, also damage wiring and buildings. They also spread parasites and disease to other animals, and in some cases to humans.
Yes, here are just some ill-effects. I'm not sure if rapid drops in blood sugar that lead to coma and death are mentioned here. I'm also not sure if hyponatremia (low sodium) and the brain damage...