Providing information about pet foods and pet food contents; Providing a website featuring information about the contents, ingredients, and additives present in pet foods; Providing access to a database of information about pet food; Providing access to a database of information about pet foods via a mobile application; Evaluating and rating the ingredients, contents, additives, and presence of contaminants, pesticides, and preservatives in pet foods; Providing rankings of pet foods based on the contents, additives, and presence of contaminants, pesticides, and preservatives in pet food products offered for sale by others