426 DISEASE IN WILD MAMMALS AND BIRDS 
primarily due to loss of substance in organs necessary 
to life and to an acid intoxication. 
Wasting occurs first in stored substances, fat, glyco- 
gen, etc., then in the least used organs. The bones usually 
show some rarefication. The animal, as a rule, dies from 
acid intoxication before atrophy of the organs is marked. 
In the wild, when animals are forced to seek their food 
with the expenditure of much energ}^ and where feasts are 
often followed by fasts, this using up of storage supplies 
Table 20. 
Detailed Analysis of the Various Diets Used at the Philadelphia Garden on 
Basis of 100 Grams of Mixed Food. 
Omnivora 
Carnivora 
Herbivora Succu- 
lent Vegetables 
Herbivora Coaree 
Food 
.2 
03 
a 
a 
a 
a 
a 
M 
1 
o 
a 
1 
00 
Protein 
14.3 
11.5 
15.6 
17.2 
6.1 
3.2 
6.4 
7.1 
Fat 
9.5 
7.2 
18.8 
.3 
2.6 
.5 
2.2 
1.3 
Carbohydrate 
Calcium 
26.7 
.034 
41.2 
.068 
.058 
.109 
18.5 
.067 
25.7 
.025 
35.9 
.071 
51.2 
.044 
Magnesium. . 
.058 
.093 
.118 
.133 
.164 
.119 
.289 
.16 
Potassium . . . 
.497 
.713 
1.694 
1.671 
.538 
.242 
.644 
.324 
Sodium 
.103 
.284 
.421 
.373 
.08 
.291 
.089 
.261 
Phosphorus. . 
.263 
.484 
1.078 
1.148 
.556 
.342 
.692 
.458 
Chlorin 
.117 
.377 
.378 
.528 
.038 
.044 
.073 
.063 
Sulphur 
.338 
.486 
1.146 
1.119 
.134 
.125 
.217 
.163 
Iron 
.0032 
.0063 
.015 
.0055 
.0018 
.0012 
.0022 
.0012 
cannot help being a factor in preserving the integrity of 
the storage and eliminative organs. In captivity this 
cannot occur. Food is supplied regularly, exercise is 
lacking, consequently overloading and disease of storage 
and eliminative organs is more or less constant — a situa- 
tion very marked in the Carnivora. 
A further study of Table 19 in the light of the finer 
analysis of the ingredients of the diets, shown in Table 20, 
explains, at least in part, the high percentage of certain 
types of disease in relation to particular diets. 
In the food of the first group, the omnivorous mam- 
mals, there is a moderately increased carbohydrate con- 
tent and an unevenly balanced inorganic content, the 
