AFAIK the analysis given by 'Ktee' for Green Tripe refers to the (seemingly) one and only analysis done by GreenTripe.com [GTC], some years ago.
The information from the USDA database is not any more recent, but does have somewhat different values from the GTC analysis, probably because the GTC values reflect the contents of that particular sample of their
minced product, rather than reflecting what might be obtained from a particular tripe, of which there are four varieties in ruminants, from each of the 4 stomach compartments. Where a product is minced, then likely all 4 compartments would be minced together by many suppliers :-
Moisture 84.2% [71.4%]
Total lipid (fat) 3.7% [11.7%]
Protein 12.1% [15.8%]
Ash 0.55% [1.23%
Phosphorus 0.064% [0.14%]
Calcium 0.069% [0.12%]
Calories 386Cal/lb [756Cal/lb]
(First values are from the USDA database Release 19 - 2006, though the values have been the same for (at least) the past 3 years. GreenTripe.com analysis figures are in the square brackets for comparison.)
There are major differences with the moisture and fat contents, and hence the major difference in the energy content of these samples. The seemingly lower protein content in the USDA analysis is probably explained by the other values being higher, rather than there being any major protein content differences in the stomach walls of these two samples. USDA also, only seemed to have based their values on one sample.
One extremely useful property that tripe exhibits is the
much lower phosphorus content, than is found in most meat and other offals. Along with the higher calcium content, though these analyses differ slightly in the amounts and Ca:P ratio, they both illustrate this property of the Ca:P ratio being almost balanced, though personally I would not depend on these values as being either accurate or relevant for the tripe that I regularly feed my own dogs. Accordingly they also get bones of various sorts.
Use of bone as a Ca:P regulator in the diet means that very little bone is required to balance out a lot of boneless meat. I once calculated that 100g of bone could supply the additional calcium to (theoretically) balance out the phosphorus in around 9kg of boneless meat. If using offal such as liver, then only about 5kg would be 'balanced' with the same 100g of bone. This is for a (purely theoretical) ratio of 1:1, which is not quite the ideal ratio, but the calculation was only ever meant to be illustrative.
I don't think that
any enzymes that come with tripe are going to be much use at all, unless perhaps you are planning to feed your dog exclusively on grass or veggie gloop! :rolleyes:
Much the same argument applies to the enzymes present in any so-called
"live foods", that have not had their cellular enzymes destroyed, usually by processing or by heat as 'Ktee' mentioned. Enzymes are extremely specific in what they do, so that with regard to digestion of food in a canine stomach and beyond:-
(a) The purpose they normally fulfil may not be at all relevant to the primary digestion of any or all of the food the dog is actually being fed.
(b) It is fairly certain that the pH environment these enzymes would find in the (lower part of the) stomach would denature them to a greater or lesser degree, at least temporarily.
(c) Even if not completely denatured, most of them would be partially digested by the pepsin in the stomach.
(d) Those that survived partial digestion in the stomach would then have to survive digestion by the pancreatic and other proteases present in the duodenum.
(e) Even if they survived all this, though enzymatic action is fairly swift for those enzymes functioning in their normal and appropriate environment, to 'digest' food for those that in some way could, would be so slow and incomplete that they would be would be wheeched (an appropriate Scottish expression!) through the rest of the GI tract before they could do much if anything, probably then only to be digested themselves by bacteria in the large intestine or merely excreted along with the rest of the detritus.
By partial digestion, here I only mean the splitting of protein chains into two or more pieces. Enzymes are merely very specialised proteins. Once denatured by a change of shape due to the temperature or pH of the environment, or modification by other enzymes, they can no longer function.
Using the likes of pig's pancreas for helping EPI dogs digest their food is a whole different ballgame. As is the use of specific plant proteolytic enzymes like papain and bromelain.