THE DISEASES OF SHEEP 323 



also at weaning time that the udder does not become 

 congested with undrawn milk. 



GEUB IN THE HEAD. 



Most of the sheep books have chapters on this 

 disease. It seems therefore the duty of the writer 

 to speak of it also, though he must confess that his 

 practical experience with the pest has been very 

 small. This may be because his flocks have almost 

 always had shade or dark barn basements in which 

 to lie during the heat of the day, conditions not con- 

 ducive to the deposition of the eggs that hatching 

 in the nostrils of the sheep crawl up into the sinuses 

 of the nose and form the mature grubs. It may be, 

 also, that well nourished sheep the more easily repel 

 the grubs, or endure them with least inconvenience. 



There is no cure for grubs, once they are estab- 

 lished. They cannot crawl into the brain of the 

 sheep. They will come out of their own accord in 

 due time. They change into a fly that in turn lays 

 eggs for more grubs. You cannot do anything ex- 

 cept to feed well the sheep. "Grub in the belly is 

 a cure for grub in the head" is an old saying. Tar 

 on the noses will let the sheep eat in comfort; once 

 shepherds bored holes in logs and put salt in the 

 bottom of the holes and pine tar around them. 

 Sheep eating the salt got the tar around their nos- 

 trils. These supplies needed replenishing daily, or 

 oftener. Easier is the darkened shed for the sheep 

 to lie in. The shepherd is apt to forget to freshen 

 the tar. Moreover the shade, especially the dark- 



