Common dietary DHA sources include fish—such as salmon, sardines, tuna, and other seafood—eggs, and organ meat. In pet foods, sources of DHA include fish, fish meal, and fish oil.
Prior to weaning, puppies get DHA from their mothers. Mothers, both human and canine, transfer DHA from their body tissues to their offspring during pregnancy and lactation.
After weaning, puppies can obtain DHA for continuing neural development through diet.