This must depend on their previous feeding and management, the breed, and the purposes required. The improved breeds and many of their crosses, will mature for the butcher as fully at three or four, as inferior cattle at five to seven years old. If pushed rapidly with proper food, they will of course be _ripe_ much sooner than if stinted. When cattle have to be purchased for work, or cows for the dairy, it becomes an object to keep them as long as they can be made profitable, and yet be turned off for fattening at a fair price. We have seen active and spirited oxen in the yoke at 16 or 17; but they seldom do as well after 12 or even 10 years. Old cattle are liable to more diseases than young; are less hardy; and they recover more slowly when exposed to scanty feed or hard usage. They also fatten with more difficulty, and their meat is inferior. When they can be sold advantageously to the feeder, and replaced without inconvenience, it is found to be most profitable to turn them off at seven or eight years. They will by that time have attained full maturity; they will feed rapidly, and make the largest amount of good beef. If there are extraordinary milkers among the cows, or superior workers among the oxen, it is better to keep them as long as they maintain their full vigor. Fattening Cattle. Such as are designed for the shambles the ensuing fall or winter, may be allowed to do their spring's labor; or if cows, they may be milked into summer after calving, or go farrow during the previous year. They should early be put on the best summer feed, and it is better to be occasionally changed, to give variety and freshness, and keep the animal in good appetite. Let the fattening animals have the best, and after they have cropped it a while, give them a fresh field; and the other animals or sheep can follow and clear off the remaining herbage, preparatory to shutting it up for a new growth. Some prefer an extensive range of rich feed, which is unchanged throughout the season; and when it is not necessary to divide the pasture with the other animals, this is a good practice. [Illustration: Fig. 9.] [Illustration: Fig. 10.] [Illustration: Fig. 11.] Three cuts of improved forms, Nos. 9, 10, and 11. The above cuts illustrate the forms which the most improved beef-cattle should possess. The selection of Animals for Stall Fattening.