No it's not better. Unless you're an expert at dog nutrition, I'd leave it to the professionals. It's really an extension to the natural holistic gluten-free organic paleo movement that likes to wash away science by "what makes sense".

It makes sense to think that the sun rotates around the earth, and it makes sense that the earth is flat. I don't understand how people can trust their senses when it's fooled all the time. That's why science and medicine exist in the first place.

If you wanna use a common-sense argument, here is my question to those who claim that the natural model, or raw food, or paleo diet (for humans) is going back to what the earth and evolution has designed us to do. How is that relevant to our lives now? I mean the measure of health we use now is mostly longevity with a mix of vitality. You wouldn't wanna live 150 years but vegetated for move for 100 of them, nor do you wanna live with excess energy for 30 years. I think most people would agree that a very healthy human in the 21 century is someone who lives to their 90s, and able to live without assistance till their early 70s. Either way, evolution, nature, etc didn't design humans for this. People died a lot younger back in the day and the diet they consumed could have been better for that life style. We created this insanely long life expectancy with medicine and science. We are on our own here. We have to figure out what works best for us and what doesn't. Looking at what our ancestors used to eat is not really relevant here.

I'm trying to say, I would take an MD or a Vet advice over that of "holistic natural living" any time. Unless I'm myself a Dr or a vet and can have an opinion that would mean something. My random thoughts aren't science. Sure I'll ask questions, but I trust them. I trust my Dr with my health and I trust my vet with my dogs health and their fellow vets who work in feeding trials and studies regarding dog foods.