Homemade dog food website, http://petspy.com, examined commercial dog food companies and compared the ingredients to help educate pet owners about pet nutrition online.

The site says comparisons made through research have confirmed the varying levels of natural and refined ingredients that are placed into some petfoods sold in the U.S. "The words 'natural' and 'healthy' are not always accurate on petfood packages," said a source for the website.

The website offers dog food reviews for natural sources and some store-bought specialty brands. The comparisons made on PetSpy.com have been placed into accessible content online that includes streaming videos, e-books and blogs.