This illustrates in a very satisfactory manner a fact which has been many times demonstrated in animal husbandry experience, viz.: that very good results can be secured in physical development in young animals which are abundantly supplied with a satisfactory diet, even when the hygienic surroundings are bad. This is not a defence of poor sanitation, but affords a basis for comparison of the relative importance of diet and other factors which influence development and vitality. The same may be said of exercise as contrasted with diet. Young bulls are often given wholly inadequate opportunity for activity, yet on a highly satisfactory diet they develop into remarkably fine animals. Exercise is of course a very essential thing to perfect health and the long maintenance of vitality, but Highly satisfactory nutritive conditions are capable of protecting young animals to a surprising degree against physical and hygienic handicaps.