https://www.facebook.com/redbarninc?sk=app_121677374624060 -the first 500 who get 5 friends to like them on facebook will get it

http://www.k9pearlywhites.com/free-stuff/

http://www.rumblepet.com/

http://www.petcurean.com/coupon

http://petresearch.com/ or https://www.facebook.com/PetResearchInc/app_190322544333196

https://www.facebook.com/beneful/app_355827794445303

http://berganpet.com/prudence-free-sample/ -Update-they’re having issues. I’ll update when it works again

https://www.facebook.com/HillsPetUS/app_301889886597107

http://store-us.cloud9forcats.com/products/free-sample -click add to cart and checkout -working again