Flax Oil For Animals Barlean's Flax Oil For Animals is a rich source of Omega-3 (alpha linoleic acid) and has been discovered to be "essential" to health of animals and humans. Omega-3 fatty acids are purposely avoided in the production of commercial pet and animal foods as they may go rancid, limiting the shelf life of these products. The result is a deficiency of these vital nutrients in these foods and ultimately in your pet. Barlean's has taken the extra steps necessary to preserve the integrity of flaxseed oil, providing your pets with the valuable Omega-3 fatty acids they require for optimal health.