34 



BULLETIN 405, U. S. DEPAETMENT OF AGEICULTURE. 





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ens until the animal dies without a struggle. The convulsive attacks 

 of dyspnoea, however, may be considered typical of lupine poisoning. 

 Drooping of the ears is noticeable in the early stages of the poisoning. 

 In many cases the poisoned animal is continually pushing its head 

 against surrounding objects. In corral cases the sheep pushes 

 against the fence, lowering its head so that sometimes the animal 

 almost stands on its head. These attitudes are shown in Plate III 

 figures 1 and 2. If moved from one point it may immediately push 

 up against the fence in another place, sometimes throwing its head 



/?j^, A;^ through an opening 



and remaining in that 

 position. Sometimes 

 the head wiU be 

 swung rhythmically 

 from side to side. 



Generally when 

 sheep become af- 

 fected on the range 

 they run about in a 

 frenzied way, butting 

 into other animals and 

 objects. Handling the 

 animals under such 

 conditions excites 

 them to such an ex- 

 tent as seriously to 

 interfere with their 

 chances of recovery. 

 When attempts were 

 made to administer 

 remedies by drench- 

 ing, it was found that 

 the animals lost more 

 by the increased ex- 

 citement than they 

 gained from the remedy. If the sheep does not die in the period of 

 excitement, it staggers until it falls, then lies in a stupor, which in 

 the fatal cases gradually grows deeper. 



The pulse and respiration are very high in the acute stages of the 

 intoxication, but later are not very different from normal, except 

 that the pulse rate is frequently increased just before death. 



The intoxication produces no effect on the temperature, but in long- 

 continued cases the temperature gradually falls, sometimes to be- 

 tween 98° and 99° F. The curves (fig. 2) showmg the changes in 



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Fig. 2. — Curves showing the changes in pulse, respiration, and tem- 

 perature of sheep No. 185. 



