Eyes and brains likely provided omega-3 fatty acids to dogs’ ancestors, but those organ tissues are not used in many byproduct pet food ingredients.
Eating what unfussy hunters and gathers eschewed, such as rodent eyes, may have provided sources of vital nutrients to dogs during domestication, including omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), along with omega-6 fatty acid alpha linolenic acid (ALA).
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