Intermitted Breeding. 247 



supply arteries may regain their contractility, if the re- 

 laxation be not too severe ; but the extent of injury, or 

 the probability of recovery, can only be determined by 

 trial of this course. The better and only safe course is, 

 very ^/-i2^««/ increase in. feed, and in blood made from it; 

 in artery size and udder supply ; and in udder size and 

 milk yield. 



When yield .is only gradually augmented, the artery 

 walls gradually gain strength, and maintain their contrac- 

 tility ; and injury to either udder or arteries is prevented 

 by the maintenance of contractile power, as is natural to 

 both; and indispensably necessary in the udder-supplying 

 arteries, to prevent the suspension or permanent loss of 

 breeding power in the cows that are so profitable while in 

 milk, because their full yielding power is established. But 

 it is not best nor even safe to exceed the natural power, 

 as the udder-supply artery engorgement has limits, which 

 are easily reached, and beyond which it is not safe to ex- 

 periment in the way of increasing milk yield. 



When farrow cows do not come into heat at their usual 

 season, while still continuing their usual yield, they should 

 have their yield reduced, by taking less and less of their 

 milk, if their breeding be desired, till coupling heat ap- 

 pears. When, by steadily reducing their yield, they at 

 length come into heat, this is the consequence of an in- 

 crease of blood in the vessels contiguous to the ovaries. 

 And this condition of heat can be induced earlier, by an 

 earlier reduction of yield, and of blood supply to the milk 

 glands, by which course the supply of blood to the region 

 of the ovaries is increased. In this way farrow cows may 

 resume breeding earlier, from earlier drying. 



In nearly all instances farrow cows are those that have 

 been petted and fed with moist feed, or specially prepared 

 mixtures well adapted to distend the digestive organs with 

 food, and the udder-supply arteries with blood, and the 



