American Veterinary Medical Association
www.avma.org  

Pet Food Industry
www.petfoodindustry.com

Pet Sitters International
www.petsit.com

Pet Food Institute
www.petfoodinstitute.org

Humane Society of the United States
www.hsus.org

SPCA
www.spca.com

Pet Industry Distributors Assoc.
www.pida.org

Pet Business Magazine
www.petbusiness.com

H.H. Backer Associates Inc.
http://www.hhbacker.com
/hhbacker/index.asp