We marvel at what we call the wisdom of Nature, but how unlike our own! How blind, and yet in the end how sure! How wasteful, and yet how conserving! How helter-skelter she sows her seed, yet behold the forest or the flowery plain. Her springs leap out everywhere, yet how inevitably their waters find their way into streams, the streams into rivers, and the rivers to the sea. Nature is an engineer without science, and a builder without rules.
The animals follow the tides and the seasons; they find their own; the fittest and the luckiest survive; the struggle for life is sharp with them all; birds of a feather flock together; the young cowbirds reared by many different foster-parents all gather in flocks in the fall; they know their kind—at least, they are attracted by their kind.
A correspondent asks me if I do not think the minds of animals capable of improvement. Not in the strict sense. When we teach an animal anything, we make an impression upon its senses and repeat this impression over and over, till we establish a habit. We do not bring about any mental development as we do in the child; we mould and stamp its sense memory. It is like bending or compressing a vegetable growth till it takes a certain form.
The human animal sees through the trick, he comprehends it and does not need the endless repetition. When repetition has worn a path in our minds, then we, too, act automatically, or without conscious thought, as we do, for instance, in forming the letters when we write.
Wild animals are trained, but not educated. We multiply impressions upon them without adding to their store of knowledge, because they cannot evolve general ideas from these sense impressions. Here we reach their limitations. A bluebird or a robin will fight its reflected image in the window-pane of a darkened room day after day, and never master the delusion. It can take no step beyond the evidence of its senses—a hard step even for man to take. You may train your dog so that he will bound around you when he greets you without putting his feet upon you. But do you suppose the fond creature ever comes to know why you do not want his feet upon you? If he does, then he takes the step in general knowledge to which I have referred. Your cow, tethered by a long rope upon the lawn, learns many things about that rope and how to manage it that she did not know when she was first tied, but she can never know why she is tethered, or why she is not to crop the shrubbery, or paw up the turf, or reach the corn on the edge of the garden. This would imply general ideas or power of reflection. You might punish her until she was afraid to do any of these things, but you could never enlighten her on the subject. The rudest savage can, in a measure, be enlightened, he can be taught the reason why of things, but an animal cannot. We can make its impulses follow a rut, so to speak, but we cannot make them free and self-directing. Animals are the victims of habits inherited or acquired.
I was told of a fox that came nightly prowling about some deadfalls set for other game. The new-fallen snow each night showed the movements of the suspicious animal; it dared not approach nearer than several feet to the deadfalls. Then one day a red-shouldered hawk seized the bait in one of the traps, and was caught. That night a fox, presumably the same one, came and ate such parts of the body of the hawk as protruded from beneath the stone. Now, how did the fox know that the trap was sprung and was now harmless? Did not its act imply something more than instinct? We have the cunning and suspicion of the fox to start with; these are factors already in the problem that do not have to be accounted for. To the fox, as to the crow, anything that looks like design or a trap, anything that does not match with the haphazard look and general disarray of objects in nature, will put it on its guard. A deadfall is a contrivance that is not in keeping with the usual fortuitous disarray of sticks and stones in the fields and woods. The odor of the man's hand would also be there, and this of itself would put the fox on its guard. But a hawk or any other animal crushed by a stone, with part of its body protruding from beneath the stone, has quite a different air. It at least does not look threatening; the rock is not impending; the open jaws are closed. More than that, the smell of the man's hand would be less apparent, if not entirely absent. The fox drew no rational conclusions; its instinctive fear was allayed by the changed conditions of the trap. The hawk has not the fox's cunning, hence it fell an easy victim. I do not think that the cunning of the fox is any more akin to reason than is the power of smell of the hound that pursues him. Both are inborn, and are quite independent of experience. If a fox were deliberately to seek to elude the hound by running through a flock of sheep, or by following the bed of a shallow stream, or by taking to the public highway, then I think we should have to credit him with powers of reflection. It is true he often does all these things, but whether he does them by chance, or of set purpose, admits of doubt.
The cunning of a fox is as much a part of his inherited nature as is his fleetness of foot. All the more notable fur-bearing animals, as the fox, the beaver, the otter, have doubtless been persecuted by man and his savage ancestors for tens of thousands of years, and their suspicion of traps and lures, and their skill in eluding them, are the accumulated inheritance of ages.
In denying what we mean by thought or free intelligence to animals, an exception should undoubtedly be made in favor of the dog. I have else where said that the dog is almost a human product; he has been the companion of man so long, and has been so loved by him, that he has come to partake, in a measure at least, of his master's nature. If the dog does not at times think, reflect, he does something so like it that I can find no other name for it. Take so simple an incident as this, which is of common occurrence: A collie dog is going along the street in advance of its master's team. It comes to a point where the road forks; the dog takes, say, the road to the left and trots along it a few rods, and then, half turning, suddenly pauses and looks back at the team. Has he not been struck by the thought, "I do not know which way my master is going: I will wait and see"? If the dog in such cases does not reflect, what does he do? Can we find any other word for his act? To ask a question by word or deed involves some sort of a mental process, however rudimentary. Is there any other animal that would act as the collie did under like circumstances?
A Western physician writes me that he has on three different occasions seen his pointer dog behave as follows: He had pointed a flock of quail, that would not sit to be flushed, but kept running. Then the dog, without a word or sign from his master, made a long détour to the right or to the left around the retreating birds, headed them off, and then slowly advanced, facing the gunner, till he came to a point again, with the quail in a position to be flushed. After crediting the instinct and the training of the dog to the full, such an act, I think, shows a degree of independent judgment. The dog had not been trained to do that particular thing, and took the initiative of his own accord.
Many authentic stories are told of cats which seem to show that they too have profited in the way of added intelligence by their long intercourse with man. A lady writing to me from New York makes the following discriminating remarks upon the cat:—