Greenopia, an online directory for everything green, recently released its independent ratings of 30 popular petfood brands sold in the USA.

The only brands receiving the coveted Greenopia Four-Green-Leaf Award were Karma of Natura Pet Products and Raw Advantage .

Greenopia collected data from manufacturers and independent sources about each brand's ingredients, packaging, sustainability reporting, supply chain, animal testing policies and green building design.

Companies were given additional points for their adoption of environmental initiatives. One-third of the brands evaluated earned zero-leaf ratings, revealing them to be below Greenopia's minimum green threshold.

"Sometimes it is hard to know which brands are safest and healthiest for your pet," said Gay Browne, Greenopia's founder and CEO. "We've combined analysis of sustainability issues and health considerations to make it clear to our readers which products are better for the environment and their pets."