Debra M. Eldredge, DVM, has won writing awards from both the Dog Writers Association of America and the Cat Writers' Association. Dr. Eldredge has practiced for more than twenty-five years at a small animal clinic. She has written articles for Catnip, Cats USA, and Cat Fancy.

Liisa D. Carlson, DVM, runs Carlson Pet Hospital, which was started by her late father, Delbert G. Carlson. She contributed extensively to the previous edition of this reference.

The late James M. Giffin, MD, coauthored all previous editions of this guide.