yellowdaisy,
I think HK is an excellent company, with quality foods and high standards (including safety). The formulas are pretty gentle and I’ve never known dogs to have trouble with it, especially sensitive/touchy stomach dogs. I like the Zeal formula best (which many sensitive dogs do well on when they can’t on other foods), then the Embark. Zeal is HK’s highest protein and uses a very high quality source, though the fat is very, very low — which some dogs do best with and others need to add back.
The only negatives I encounter with HK are that some formulas are grain inclusive (when owners don’t want that), some dogs aren’t crazy about the soupy texture, and high cost . . . esp. grain free Zeal & Embark. I would like to see, at their higher price point, their base ingredients be organic (like Stella & Chewy’s) when it’s a known heavily pesticide contaminated ingredient or preference for less contaminated fruits/veggies/greens chosen when organic isn’t feasable/prohibitively expensive — kind of like how I shop at the grocery store. But they are still very clean, high quality foods and I would feed them + highly recommend the brand.
In Nutrisource/Pure Vita’s defense, I really don’t think that their food can be blamed for tumors. Something triggers cancer to start in the body and that can be many complex factors, usually involving toxins as insults to the body and the immune system + some genetics. From there, we do know from research that cancer feeds selectively off sugars/simple carbs and need an acidic environment to be active . . . but that’s after the cancer has taken hold. Certain breeds (and their mixes) currently have very high incidences of cancer, like Goldens or Bernese Mountain Dogs; or there is a breed specific cancer like hemangiosarcoma. Some stats show more than half of all dogs and cats now die of cancer.
Pure Vita does pretty clean sourcing, for example using more expensive wild caught fish exclusively (protecting against toxins like PCBs in farmed salmon) and imposes a good bit of safety testing and quality standards. Many dogs seem to do really well on the food, esp. those with allergies/sensitivities or needing a bland diet and limited ingredient diet.
At the same time, virtually all commercial pet foods have significant contamination with bacterial toxins (enterotoxins, endotoxins, cytotoxins, etc.), from the meat, processing and handling, sanitation issues, storage, heat or lack of heat processing, moisture spoilage (like aflatoxins, etc in grains), lack of freshness, rancidity of fats/oils, etc. (You can read more about this in texts like UC Davis Vet School’s/DVM Strombeck’s Home Prepared Dog & Cat Diets, chapter 3 on commercial pet foods/food safety & preparation.)
Nevertheless, I do think homemade diets (balanced) using a wide variety of fresh foods in rotation, cleanly sourced (wild fish, grass fed & free range, organic), are best. So I think you are on the right track. Good luck!
