Misskiwi67
Posted : 4/19/2007 3:23:41 PM
ORIGINAL: janet_rose
ORIGINAL: Misskiwi67
I wouldn't be afraid to go with a low ash grain-free formula. Protein of up to 35% would be ok for a senior dog in my opinion.
How does the idea of "high digestibility" correlate with "low ash"? Does a high mineral content make a protein less "digestible"?
Ash does not correlate with digestability at all. You would expect that high ash would mean lowered digestability, but there are several studies on pubmed that I skimmed last week, and there didn't seem to be any correlation whatsoever.
The importance of the low ash is the lower mineral content to take it easy on an old dogs kidneys. Protein has NOT been shown to be detrimental, and old dogs need more protein to maintain lean body mass. I'm waiting for the senior foods to catch on and update their formulas, but right now most senior formulas have low protein.
You might look into large breed( maybe even puppy) formulas. They have low mineral content and high protein. Watch the calories and fat though...