I'm making food for our dog weekly, but wife is feeding 2/3rds canned and dry
Our last two dogs died of cancer before they were very old. One was 8, the second was 12.
I suspected their food and/or over-vaccination with questionable vaccine formulations, so now I sous vide lean hamburger, beef heart and liver at a very low temperature, add cow bone meal (hydroxyapatite), D3, K2, and iodine in 8 pound batches, and freeze them into meals.
I do this very precisely in order to maintain a low-carbohydrate and nutritionally complete food without chemicals and junk fillers/protein.
I get the dog the legally required vaccinations only and ask for titers rather than poking him with a needle every X months.
After all of this, my wife insists on mixing this with Farmina wet and dry dog food when she feeds him.
What are some good arguments against her insisting on doing this? Am I wrong?