Journals
American Journal of Veterinary Research
Applied Animal Behavior Science
Applied Animal Behaviour Science publishes research in the following areas: Behaviour of farm, zoo and laboratory animals in relation to animal management and welfare, Behaviour of companion animals in relation to behavioural problems, for example, in relation to the training of dogs for different purposes, in relation to behavioural problems, Studies of the behaviour of wild animals when these studies are relevant from an applied perspective, for example in relation to wildlife management, pest management or nature conservation, and Methodological studies within relevant fields.
Australian Veterinary Journal
Canadian Veterinary Journal
Full-text articles three months or older are available for FREE. This is a link to Pub-Med archive.
DVM The News Magazine of Veterinary Medicine
DVM is a magazine written for veterinary professionals, but is not a scientific journal. However, you can find articles that discuss the treatment of companion animal behavioral problems.
In Practice
A publication of the British Veterinary Association
Journal of Animal Science
This journal seems to deal mostly with issues related to the welfare of farm animals. There are a few articles that actual study operant and respondent conditioning. They also have free, full-text articles.
Journal of Applied Animal Welfare Science
"JAAWS publishes articles and reports discussing methods of experimentation, husbandry, and care that enhance the welfare of animals in laboratories, farms, homes, and the wild."
Journal of Applied Behavior Analysis (JABA)
Full text articles are available for free.
Journal of the American Veterinary Medical Association (JAVMA)
Journal of the Experimental Analysis of Behavior
Full text articles are available for free.
Journal of Veterinary Behavior and Research: Clinical Applications and Research
Psychonomic Society Publications
The Psychnomic Society publishes Behavior Research Methods, Cognitive Affective & Behavioral Neuroscience, Learning & Behavior (formerly Animal Learning and Behavior), Memory & Cognition, Perception & Psychophysics, and Psychonomic Bulletin & Review. All articles published between 1991 and 2000 are available FREE!
Society and Animals
From the journal's website: "Society & Animals is at the forefront of the emerging multi-disciplinary field of Human-Animal Studies, which explores the ways in which nonhuman animals figure in human lives. The journal publishes studies concerning experiences of nonhuman animals from psychology, sociology, anthropology, political science, and other social sciences and history, literary criticism, and other disciplines of the humanities."
The Veterinary Record
Another publication of the British Veterinary Association.
Veterinary Clinics of North America: Small Animal Practice
Each issue has its own theme and title. Several issues have had a focus on behavior. Follow this link for an explanation of this journal's somewhat confusing publication history.
Veterinary Quarterly
To be honest I'm still not quite sure what this site is all about, but it looks like it might be useful.
American Psychological Association Journals (PsycARTICLES.com)
Search just about every APA journal. Abstracts are free, but full articles cost $11.95 each.
Animal Behaviour
Publication of the Animal Behaviour Society.