Just three of 30 popular petfood brands received top scores in a ranking of eco-friendliness by Greenopia.

Greenopia collected data from petfood manufacturers and independent sources about many product factors, such as ingredients, packaging, animal testing policies and green building design. The brands were rated on a green-leaf-system, with companies receiving extra points for the implementation of environmental initiatives.

Top scoring brands got a four-green-leaf award and included the Karma Organics line from Natura Pet Products, The Honest Kitchen and Raw Advantage. Nearly one-third of the brands evaluated got the lowest, zero-leaf rating, including Friskees, Iams and Purina.