A lot of pet food companies offer free samples:
- Cyberdog: http://www.cyberdog.com/samples.htm
- Flint River Ranch Natural Dog Food: http://www.frrinc.com/freesample.html
- *MightyDog: http://www.mightydog.com/home.aspx?sid=1&pid=1
- Iams: http://www.iamspromise.com (click on "receive a free bag of Iams" button)
- Life's Abundance: http://www.trilogyonline.com/Trilogy/Pets/LifesAbundance (sample button is on the left side)
- Maximum (click on "For Dogs" or "For Cats"): http://walmart.triaddigital.com/enhancedrendercontent_ektid14650.aspx
- Natural Choice: http://www.nutroproducts.com/yourfamily/
- Whiskas: http://www.americangreetings.com/promo/whiskas/getsample.pd
- http://www.cesar.com (requires registration, which takes a while)
Make your own Pet Food - this can be very frugal!: http://www.recipezaar.com/recipes/pet-food
Other free pet stuff:
- Free "Greenies" Dog Chew: http://www.greenies.com/en_US/default.asp?CSID=600
- Free sample of a supplement to help with coat problems: http://www.stopitch.com/Taste_Sample/taste_sample.html
- Pet Tips: http://pet.tips.net/