Feral dogs and dogs running loose threaten wildlife by killing them, stressing them, and passing along diseases. You knew that. This paper in the journal BioScience has the data, and some solutions. Mostly it’s a good resource if you need a quick review of the dog issue.

 
The BioScience paper also received coverage in the popular press. Read a sampling here:

Reuters/Mother Nature Network
Yahoo! News
Red Orbit

This article in High Country News from three years ago really brings the issue to life.