I am compelled to respond to George Fenwick's commentary ("The destructive invasive species purring on your lap," Feb. 26). He cites recent studies suggesting very high bird and mammal deaths due to outdoor cats. He then goes on to propose a Draconian solution that could accurately be described as a cat witch hunt. I do acknowledge the problem, particularly with feral cats (free-roaming, unowned). But Dr. Fenwick's attempt to demonize cats by use of terms like "invasive species," "invaders," "introduced predator," and "slaughter" invests his thesis with a hysteria usually reserved for al-Qaida sightings.