Need help re: nutritional info terminology and ash content

Since there are some brands and/or flavors that aren't included on Dr. Pierson's cat food chart, I've been looking up nutritional info and putting it into a spreadsheet, using the formulas she provided here to get a rough idea of how they compare to the ones listed on her site:

http://catinfo.org/?link=cannedfoods#Calculating__Percentage_of_Carbohydrates:

For the most part, the info is listed under guaranteed analysis on each company's website, which is most helpful to a newbie like me, because I can just plug the numbers into my spreadsheet. ;-)

But every once in awhile, I run across some other terminology, e.g., Analytical Constituents, As Fed Basis, etc.

What's the difference?

I've also noticed that a lot of cat food doesn't list the ash content per the guaranteed analysis.  Or is the info there, and I just don't know how to recognize it and know to to crunch the numbers?

Any help would be greatly appreciated. :-)

Never mind. :-)

I accidentally stumbled across some info I needed on a site re: dog food nutrition.  I don't know why I didn't think to look there first. ;-)

cheeser said:

 
Never mind. :-)

I accidentally stumbled across some info I needed on a site re: dog food nutrition.  I don't know why I didn't think to look there first. ;-)

Click to expand...

Why don't you share your information just in case others are now curious

mrsgreenjeens said:

 
Why don't you share your information just in case others are now curious

Click to expand...

Oh, noes!  I could have sworn I bookmarked that site.  Dang it! *iz so embarrassed*

But if I remember correctly, the guaranteed analysis just lists a range of nutritional values (e.g., minimums and maximums), whereas 'as fed' lists the actual values in a actual sample, and is therefore the more accurate of the two.  Or something like that. ;-)

And I read somewhere that guaranteed analysis is sometimes listed as analytical constituents.

I'm still trying to wrap my warped little noggin around some basic nutrition terminology.  So if I can't compare apples to apples, I at least want to be able to compare them to an orange or something in the same ballpark. ;-)

It's just so confusing for a newbie like me when I run across a company's website that lists the nutritional info in anything other than a guaranteed analysis, and I'm not sure what to do with it for my spreadsheet. ;-)