LARKSPUR POISONING OF LIVE STOCK. 55 



For our purpose it did not seem necessary to carry on any further 

 experimentation with horses as there is no reason to think that they 

 are ever poisoned upon the range. Observation of horses on the 

 range and in pastures containing larkspurs showed that these animals 

 do not eat the larkspur early in the season. In the fall after the 

 tall larkspur has become dry, horses, like cattle, seem to have a fond- 

 ness for the larkspur leaves, although they do not eat them so 

 greedily as do the cattle. Inasmuch as the larkspur at this time is 

 not poisonous, no harm results from this feeding. 



EXPERIMENTAL FEEDING OF DELPHINIUM BARBEYI TO SHEEP IN 1910. 



Five experiments were carried on of feeding Delphinium harbeyi 

 to sheep. These experiments were commenced June 3 and continued 

 until July 17. Three of the animals, Nos. 118, 104, and 114, were fed 

 tops of the plant, including the leaves and stems. The other two,' 

 Nos. 108 and 116, were fed tops, including the leaves, stems, and 

 flowers. Table YIII gives a summary of these experimental feedings. 



Case 118, weighing 97 pounds, was fed 67.75 pounds between June 

 3 and July 22 without any results. Case 104, weighing 90 pounds, 

 was fed 68 pounds between June 23 and July 5 without any injurious 

 results. Case 114, weighing 65 pounds, received 31.75 pounds be- 

 tween June 23 and July 5 without results. Case 108, weighing 94 

 pounds, was fed 104 pounds between July 6 and July 17, or 10 pounds 

 more than its own weight, without being poisoned. Case 116, weigh- 

 ing 93 pounds, received 121 pounds between July 6 and July 17, or 

 28 pounds more than its own weight, without being affected. 



Thus of these 5 sheep, eating from 48.8 to 130.1 pounds, on a basis 

 of 100 pounds average weight, none were injuriously affected by the 

 plant. 



EXPERIMENTAL FEEDING OF DELPHINIUM BARBEYI TO SHEEP IN 1911. 



In 1911 two experiments were made of feeding Delphinium, har- 

 heyi to sheep. Although the general results of the work of 1910 were 

 conclusive, it seemed best to feed some of the plant at the early 

 stages of its growth in order to make sure that it was not poisonous 

 at that time. 



Sheep 134, weighing 140 pounds, was fed from June 19 to June 

 25, 49 pounds of the leaves and stems of Delphinium harbeyi before 

 blossoming. This was at the rate of 35 pounds per 100 pounds of 

 weight of the animal. 



Sheep 135, weighing 136 pounds, between the same dates, was fed 

 37 pounds of the same material, or 27.2 pounds per hundredweight 

 of the animal. 



Neither of these sheep showed any effects from the feeding, and in- 

 asmuch as the amount fed, relative to the weight of the animal, was 



