Applied Ethology - Resources page dedicated to the study of animal behaviour, particularly that of domestic animals or animals kept in captivity. Articles on various behaviour problems, in cats, dogs and horses.
BehavioRx Pet Behavior Resources - Resources for canine, feline, and equine owners regarding pet behavior and modification. Includes a guide to select a pet behavior consultant.
Cambridge Center - In conjunction with animal trainers, an excellent overview of positive reinforcement techniques being used by professional animal trainers and in zoos, and how these same techniques can easily be applied with the family pet.