14 



BULLETIN 947, TJ. S. DEPARTMENT OF AGRICULTURE. 



The plan of feeding, as with Sheep 421, was to have the animal eat 

 as much of the H. hoopesii as it would take. The plant was cut up 

 and mixed with a certain amount of alfalfa hay, as the animal would 

 not eat it without hay. The quantity of hay mixed with the H. 

 hoopesii varied, being sometimes as much as one-half of the quantity 

 of the poisonous plant. This feeding was continued from May 30, 

 and the animal appeared in good condition with no evident symp- 

 toms of poisoning until June 23. On June 18 it was turned into the 



Fig. 4. — An overgrazed range on which Helenium hoopesii has taken almost complete possession. 



pasture with the other animals, but during the rest of the time it 

 was confined to the corrals. 



On June 23 it was noticed that while lying down the sheep regur- 

 gitated, and there was some belching of stomach gas. On June 24 

 some green material was noticed about the mouth, and on June 25 

 it was found that she had vomited. On June 27 the animal had 

 become quite weak and was not inclined to stand. At this time she 

 evidently, to some extent, had lost her appetite for any kind of food. 

 The feeding, however, was continued. On June 29 the pulse was 

 noted as somewhat irregular and the animal was lying down most 

 of the time, although still strong enough to stand. From this time 



