It’s in your cat’s instincts to go hunting, but it’s not an activity you should be supporting. Your cat doesn’t understand that hunting rodents could harm her health and your own. If a mouse is brought into the house, there is a risk of contracting the plague and leptospirosis. Humans could get hantavirus or visceral larval migrans from rodents. Pregnant women might also get infected with toxoplasmosis. Your cat could start vomiting, having diarrhoea, or suddenly lose weight because of the roundworms that mice have.
Having a bell hanging on your cat’s collar can signal the prey to hide or escape when your cat is near.
Keep your cat inside the house so she doesn’t chase after rodents running around at night.
In case of an infestation, you should contact an exterminator to get rid of the rodents without harming your cat.