Cats generally won’t get sick after eating sparrows. Unless the sparrow is infected with a certain disease, the cat may be infected after eating it. If it is a healthy sparrow, you don’t need to worry too much, but you need to deworm the cat regularly, otherwise Cats may become infected with internal parasites.
Tips:
It is usually best not to let cats eat birds, mice, cockroaches and other animals, as these animals are likely to Carrying bacteria or viruses may have an impact on the cat's health.