brookcove
Posted : 1/13/2009 4:56:32 PM
First, when we talk about "balance" we need to know what we are talking about. There's two considerations, absolute values, which depend on the size of the dog (by weight), and values relative to other nutrients in the diet. For x g of phosphorus there should be x grams of calcium, is one we are familiar with.
This latter is the one that takes some study to really get in balance. Yes you can sort of make sure your dog is getting that ratio right, but what if you use beef liver to provide B vitamins - which is super high in copper and binds calcium?
The good news is that there is a WIDE range you can work with. Otherwise it would be like sheep which need supplementation even when they do get their completely natural diet - thanks to a thousand years of intense manipulation.
That's why it's possible to supplement kibble with fresh foods and still be fine. Let's say the optimum level of calciium for a 22 kg dog is between 1.5 and 2.0 grams of calcium per day. And Phosphorus is 1.0 to 1.3 g. I have no idea whether that's right and don't want to pull up my Google docs site on this slow machine. LOL
0.5 grams of calcium is huge - that's enough to actually see, it's a scant pinch. By comparison, I measure the amount of copper my sheep are allowed per day in micrograms, which can't even really be weighed - you calculate it in parts per million.
So you decide to add an ounce of chicken and three ounces of stewed carrot, celery, and potatoes. The veggies add almost no minerals at all. The chicken adds, let's say, 0.3 g of phosphorus. This means you are still fine. It's pretty hard to mess up the balance of of correctly balanced diet, as long as you stay within the "30%" rule. And if you use fresh foods you probably won't go anywhere near 30% - the four ounces of fresh ingredients noted about was a huge amount, it would fill an entire normal three dry cup food dish.
On the effort it takes to measure and whatnot. After a while - it's more time for some people and less for others - you get to where you really don't have to think about it. You find shortcuts, learn to work more efficiently, find tools that help make it easier. I wouldn't do this if it were hard! I have a ton of demands on my time. The two hours of work this takes is well worth it, though. But I do know how overwhelming it is at first. I remember the first time I did a Volhard recipe for my six dogs. I had to do it in stages!