The statistics from our local (Portland, Oregon) Audubon Society wild animal clinic are pretty sobering: "On average more than 20% of the more than 3,000 animals brought to the Audubon Society of Portland Wildlife Care Center each year are the victims of direct cat predation. . . The survival rate for cat-caught wildlife is dismal. At our center the overall survival rate for all animals is more than 40% but for cat caught-animals it is only 14%. Because of the trauma and infection associated with cat bites, the reality is that most animals caught by cats are going to die." Here's the full article: Cats and Wildlife.