Omega-6 fatty acids like linoleic acid are abundant in chicken fat and vegetable oils and support skin barrier function. Omega-3 fatty acids, particularly EPA and DHA from fish oil, have anti-inflammatory properties that benefit joints, kidneys, hearts, and cognitive function in senior pets. Most commercial pet foods provide adequate omega-6 but may be lower in omega-3. Fish oil supplements are a common addition, but dosing should match your pet's weight and condition. Excessive omega-6 relative to omega-3 can promote inflammation, so balance matters. Store fish oil in the refrigerator to prevent oxidation and rancidity, and choose products tested for heavy metals and contaminants.