178 THE FARMER'S VETERINARIAN 



of hair; pot belly; weakness; lack of endurance, 

 sweating, panting, or staggering during work; 

 dilated nostrils; frequent passage of gas and soft, 

 foul-smelling feces when starting from stable. 



The disease begins with indigestion, affecting in 

 time the pneumo-gastric nerve of the stomach and 

 then the branch nerves running to the lungs. At 

 first the air tubules and vesicles of the lungs be- 

 come dilated (aneurism) ; later they may break 

 down into large air spaces and the surrounding 

 lung tissues become involved (interlobular em- 

 physema). Air then is easily inhaled, but is ex- 

 haled with difficulty and the effort causes cough 

 and expulsion of gas (flatus). 



The distress may be relieved by treatment, but 

 perfect recovery is impossible when the lungs have 

 become badly affected. Treat by substituting wet 

 oat straw for hay in winter and grass for hay in 

 summer. Allow double the usual rest period after 

 a meal. Work when stomach is not distended with 

 food. Do not feed hay at noon. Use lime water 

 to wet all food. Once or twice a week give raw 

 linseed oil in a bran mash to open bowels. Give 

 half an ounce of Fowler's solution of arsenic night 

 and morning. Do not breed from affected horses. 



HEAT EXHAUSTION AND SUNSTROKE.— 

 The horse that is stricken with heat exhaustion or 

 which falls from heat, apoplexy or " sunstroke," is 

 sick or out of sorts at the time of attack ; otherwise 

 he would withstand heat and work. The middle 

 horse of a three-horse team suffers most and is apt 

 to succumb to the ill-effects of the combined radia- 

 tion of heat from his mates and direct rays f the 

 sun. Attacks are most apt to happen on the third or 

 fourth day of a spell of intensely hot weather char- 

 acterized by mugginess, electrical storms and mois- 



