Analysis of raw puer from hunting kennels (Quorn) showed the approximate composition of 1000 grm. of raw puer, containing 150 grm.[21] of dry matter to be as follows:—
| Grammes | ||
| Sodium chloride and sodium sulphate | 2 | ·1 |
| Sodium ammonium phosphate | 14 | ·0 |
| Earthy phosphates, principally Ca3(PO4)2 | 33 | ·6 |
| Ferric phosphate | 0 | ·87 |
| Calcium sulphate | 1 | ·94 |
| Silicic acid | 3 | ·40 |
| Calcium in solution as CaO | 1 | ·42 |
| Total P2O5 in solution | 4 | ·00 |
| Non-volatile acids (as lactic) | 3 | ·00 |
| Volatile acids (as acetic) | 2 | ·20 |
| Amines (as ammonia) | 6 | ·20 |
| Enzymes | 3 | ·66 |
| Nitrogenous bodies not included in the above, consisting of complex amido-acids, leucin, tyrosin, xanthin, and other purine bases, indol and skatol | 17 | ·00 |
| Organic matter, cellulose, etc. mostly insoluble, including fats and soaps | 70 | ·00 |
On the dry matter the amounts extracted by various solvents were:—
Per cent. | ||
| Water | 24 | ·03 |
| Alcohol | 22 | ·27 |
| CS2 | 15 | ·57 |
| C2HCl3 (Tri-chlorethylene) | 14 | ·45 |
| Petrol. ether | 13 | ·23 |
No carbohydrates (sugars) capable of reducing Fehling’s solution were found in the puers examined.
The ash[22] of the dry fæces from dogs fed on a flesh diet varies from 20 to 34·27 per cent., with the following percentage composition:—
| Silica | 7 | ·04 |
| CO2 | 4 | ·62 |
| SO3 | 7 | ·37 |
| Fe2O3 | 4 | ·22 |
| CaO | 25 | ·29 |
| P2O5 | 26 | ·41 |
| MgO | 15 | ·52 |
| Cl | 1 | ·50 |
| Alkali | 5 | ·53 |
In a dog weighing 30 kilos., fed on a mixed diet of 500 grm. meat and 200 grm. starch, 78·6 grm. dry fæces were obtained containing 23·76 per cent. ash of the following percentage composition:—
| CaO | 22 | ·3 |
| P2O5 | 25 | ·4 |
| Fe2O3 | 10 | ·6 |
| MgO | 9 | ·8 |
| SO3 | 5 | ·0 |
| Cl | 0 | ·2 |
| Alkali | 1 | ·1 |
| Insol. in HCl | 21 | ·8 |