All needless hurting of sentient creatures is cruelty, whether of the boy who tortures frogs and flies, or of the grown man who takes his pleasure in hunting to death a frightened deer. Beasts of prey must, indeed, be ruthlessly put to death, just as we execute murderers; among them are to be counted flies, mosquitoes, rats, and the other pests so deadly to the human race and to other animals. But death should be inflicted as painlessly as possible; no humane man will prolong the suffering of the humblest creature for the sake of "sport" or take pleasure in the killing. We must say with Cowper "I would not enter on my list of friends, (Though graced with polished manners and fine sense, Yet wanting sensibility) the man Who needlessly sets foot upon a worm." This does not necessarily imply that we may not rear and kill animals for food. When properly slaughtered, they suffer inappreciably-no more, and probably less, than they would otherwise suffer before death; the fear of the hunted animal is not present, and there is no danger of leaving mate and offspring to suffer. Indeed, the animals that are bred for food would not have their chance to live at all but for serving that end; and their existence is ordinarily, without doubt, of some positive balance of worth to them. Certainly the rearing of cattle and sheep and chickens adds appreciably to the picturesqueness and richness of human life; and if dieticians are to be believed, their food value could hardly be replaced by substitutes. The question of vivisection is not a difficult one. Certainly experimentation on living animals should be sharply controlled, anesthetics should be used whenever possible, and the needless repetition of operations for illustrative purposes should be forbidden. But it is far better for the general good that necessary experimentation should be performed upon animals than upon human beings; not at all as a partisan judgment, to shift suffering from ourselves to others, which would be unjustifiable, but because animals are less sensitive to pain, and unable to foresee and fear it as human beings would. The human lives saved have been of far greater worth not only to themselves but objectively than the animal lives sacrificed. Moreover, except for a few glaring instances, vivisection has involved little cruelty; and the crusade against it, though actuated by a noble impulse, has rested upon misrepresentation of facts and exaggeration of evils. What general duties do we owe our fellows?