I know a woman that lives 10 minutes from the city. There are a lot of wooded areas, so there are rats and mice in the fields. Her cat recently did battle with a large rat. the body was 10 inches long. The cat did kill the rat and drag it back to the garden, but not before taking a few bites to the body. There is no way to know if this was a sewer rat or a field rat. Should she be concerned for her cats health?