io8o Veterinary Obstetrics 



Herd 2. The next herd investigated by us consisted exclu- 

 sively of pedigreed Jerseys. There were on hand, at the date of 

 our first inspection, 228 cows, heifers and heifer calves. In addi- 

 tion, there were 8 bulls of breeding age and 10 bull calves. 



In three stables containing 96 females, among which were a 

 few cows, but mostly heifers from 1% to 3 years old, 89.6% were 

 diseased and 10.4% apparently well. 



In a fourth stable, containing 40 cows and heifers, all in milk, 

 98% were affected and 2% (i cow) apparently well. 



A fifth stable, designed for pregnant cows about to calve and 

 for calves, contained 6 cows or heifers in advanced pregnancy or 

 recently calved, 5 of which were evidently diseased and i appar- 

 ently well. The remainder of the stock in this barn consisted of 

 virgin heifers, and heifer and bull calves. 



Of 8 heifers about 9 mos. old, 8 were affected, o apparently well. 



18 " " 2 



I " " 5 



o " " 7 



o " " 3 



Of the total 44 virgin heifers and heifer calves in this stable, 

 61% were diseased and 39^ were apparently well. Excluding 

 the heifer calves under 6 months, 93% of the virgin heifers were 

 affected. 



In a sixth stable, containing 42 cows, chiefly adult or aged, 31, 

 or 74%, were affected, and 11 ; or 26%, were apparently well. 



In the entire herd of 22 Sfemales, 198, or 82.59^, were affected ; 

 and 40, or 17.5%, were apparently well. If we deduct from the 

 228 females, the 17 apparently well heifers and heifer calves not 

 over 6 months old, and which we may assume remain apparently 

 well because not yet infected, there remain 211 females, of which 

 188, or 89.1%, are affected. 



The foregoing statistics, it has since been determined, are de- 

 fective, and show too large a percentage of well animals. Cows 

 in advanced pregnancy, or about to abort, when the vulva be- 

 comes swollen and edematous, cease to show the granules in the 

 vulvar mucosa, and consequently the number of apparently well 

 is probably excessive to the extent of all of those cows which 

 were very near to parturition or abortion, in which the lesions 

 were hidden by the edema present. 



