I am the one that feeds purina and some homecooked food. Someone said that they were healthy despite the purina because of the other foods. Well, actually they get about 2/3 Purina and 1/3 meat & veggies. They get 2 cups of purina in the morning and soemtimes i scramble up an egg for each one and put in with their breakfast. At night they get under a cup of Purina and then their cooked meats (chicken hearts, gizzards or liver, beef heart or liver, sometimes ground beef or chicken, frsh fish if I have caught some, canned mackeral, salmon or sardines) and their canned unsalted green beans & carrot slices. Sometimes i boil sweet potatoes or white potatoes with the meat, sometimes some squash. I give them fish about 4 times a week, meat the other 3 nights. Yesterday at my grocery store they had a "blow out" sale on jars of Gerber's baby food, good until Jan. 07. I bought 78 jars of the sweet potatoes and about a dozen of green beans. One of the jars gives about two spoons full for each dog and I put a jar of the sweet potaotes on their purina this morning--along with a scrambled egg each.. They love sweet potaots and beans, so these little jars of strained baby food, a couple of spoons for breakfast is an added treat.
I know several farm people who drank lots of fresh, PURE milk, and ended up with the osteo., my grandmother being one. Somethings are going to happen regardless of diet. I was raised on a farm. We had tons of fresh veggies. We raised our own beef and hogs, plus had fresh killed quail, dove, duck, chicken, fish. We ate totally balanced diets. We ate lots of pears, blackberries, apples, peaches. Mom froze and canned and put up our jams and jellies. We did not use preservatives. Yet at age 10 I came down with rheumatic fever. My Mom got colon cancer. My dad died at age 58 of a stroke following surgery to clear a blood clot out of vein in neck. My Mom died at 68 of brain cancer. i have rheumatoid arthritis. and have had since in my mid 40's. My one brother is 53 and can hardly walk due to bad knees and ankles, desite having had surgery. So eating the best didn't prevent cancer, arthritis, etc from happening in my family.
Life expectancy for a golden retrieve is 10 to 12 years. They are prone to cancer, HD, thyroid and eye problems. These are not caused by any one food, nor prevented by any one food--it is just in their breed. My Buck turned 11 in Feb. He has some arthritis in his spine and hips, but not bad. He trots instead of walking, except on on leash. He has trouble with night vision & some problem with depth perception, but his eyeballs are "healthy". Just old age eyes. His muscle tone and coat are great. His heart and lungs are clear and strong. The only problem in his blood work was a kidney infection, first time ever. I would have to say Purina has not hurt him at all. Nor did it hurt my irish Setter we lost at age 12 1/2 to bone cancer in rear leg.
I could get a dog tomorrow that would awful on purina and I most definately would use something else. And even tho it sounds like I am defending Puriina, i am not. I am defending that fact that most dogs can eat purina, Eukanuba, Pedigree, and even Science diet and be healthy. And many of these same dogs would not do okay on TO. Eagle pack, Wellness, etc. (Buck didn't) And the same can be reverse--,many would not do well on the P, E, P but would do great on the TO, EP, W.
And as for the blood work, it is a darn good indicator if something is wrong. And another thing, if it could take years to know that eukanuba, Purina, etc was casuing problems all along, the very same rule would apply to the TO, Eagle pack, Wellness, Inonva, etc.
And my dogs health aren't based solely on the full blood work, and I mean Full blood work, but also in other tests and exams. coat, mouth, ears, eyes, fecals, etc, plus poor Buck gets the old "finger up the rear", which he is not crazy about.