Adapted from "Wild Animals in Captivity" by W. A. Atkinson in Chatterbox Periodical (1906, ed. J. Erskine Clark)

Notwithstanding all the care which is now bestowed upon wild animals in our zoological gardens and menageries, nearly all of them suffer a little in some way or other by confinement. When we think of the great difference which exists between the surroundings natural to a free wild animal, and those of even the best zoological gardens, we cannot but be surprised that so many animals from all parts of the world can be kept alive and in good condition in a climate so changeable as ours. Every effort is made by the keepers to copy as far as possible the natural conditions to which each animal is accustomed.

It was usual, for instance, to deprive all the flesh-eating animals of one of the greatest traveling menageries of food during one day in each week. It was found by experience that the animals were healthier when they suffered periods of fasting like this, than they were when they were fed regularly every day without a break. The explanation of this was very simple. These animals, when they were living wild in the jungles, forests, deserts, or ice-fields, obtained all their food by hunting. When game was scarce or difficult to catch, they were compelled to go hungry; and this occurred so often as to be a natural condition to which they were well accustomed. When, therefore, they were placed in cages, and were fed as regularly, though not as frequently as human beings, their health was more or less impaired.

Animals in confinement often undergo slight changes even when no alteration in their appearance or falling-off in health is noticeable. Many of them, for instance, rarely have young ones, and even when they have, the young are seldom as healthy and robust as if born in a wild state. The keepers have frequently the utmost difficulty in rearing animals which are born in menageries and zoological gardens. Yet if these animals were born in their own countries and under natural conditions, they would grow up healthy and strong, without receiving any more care than a kitten receives from its mother.

An incident which occurred in the Zoo not long ago affords a striking illustration of these facts. A wolf had an ordinary family of eight young ones. The keepers, probably thinking that these were too many for the captive wolf to bring up alone, divided the family. Four of them were left with their mother, and four of them were placed in charge of a collie. The dog took kindly to her foster-children, and reared them successfully with her own. This was only what the keepers expected. But when they placed the young ones together again, and compared the collie's family with the wolf's family, they were surprised to find that the four which had been nurtured by the collie were stronger and better animals than their four brothers and sisters. The best explanation of this result is that the collie was living a healthy natural life, while the wolf, though to all appearance quite well, was not enjoying the full vigor which results from a free and active life.

Why did the dog have greater success raising the wolf pups than the wolf pups' mother?