kcarter137,
The Asian and Mexican supermarkets will also have a selection of organs, feet, and also hearts and gizzards. I buy wild caught sardines from the Mexican supermarket on sale for 1.19/lb. For my small dogs, one 3 oz sardine is a meal but you could use it for a topper too.
http://i1326.photobucket.com/albums/u651/pugmomsandy/pictures%20for%20posting/IMG_4047600x450_zpsf34c6610.jpg
http://i1326.photobucket.com/albums/u651/pugmomsandy/pictures%20for%20posting/IMG_60801024x821_zpsad7d39eb.jpg
