My parents have always fed their dogs porridge oats for their breakfasts, without exception they have all lived well past usual life expectancy for their breed
They feed burns as their main diet but always porridge. They also add cod liver oil capsules (opened and squirted into their food) when they are getting on in years. I will also add that none or their dogs has ever had to be PTS due to ill health.
They have had 12 dogs that I can remember all different breeds from yorkies to GSD'S, They now own a black lab who is 11yrs young, she has the mearest hint of grey on her muzzle and is as energetic as ever strangers are shocked by her age, she looks about 6 I would say, never had an ailment only goes to the vet for her boosters
Think I will give Belle some, don't know why I never have