METHODS OF BESTRAINT AND COMMON OPERATIONS 251 



They have the advantage over any other method of restraint in 

 that they can be applied quickly and serve securely to cast the 

 animal. 



Knowles' casting harness is simple in construction, besides 

 being cheap, durable, and easy to apply (Fig. 63). It consists of 

 a wide web collar, from which ropes extend backward on each 

 side to the hind pasterns. The free ends of the ropes are used to 

 tie the feet and legs after the animal is thrown. An improvised 

 harness for emergency use to answer the same purpose can be 

 constructed on this plan from a long rope. 



Fig. 63. — Knowles' casting harness. 



English hopples are a form of casting apparatus in common use. 

 They consist of four strong leather straps that are buckled to the 

 pasterns. These are all connected with a chain, which can be 

 released by simply withdrawing a small bolt. The disadvantage 

 of these hopples is the danger of breaking the back or a bone in a 

 limb during efforts of the animal to gain freedom. If an assis- 

 tant holds the head with the nose turned up this accident may be 

 avoided. 



ANESTHETIZING 



Anesthetics are used to render a part or the whole of the body 

 insensible for the purpose of performing operations with greater 

 dispatch and more safety to both the operator and the patient. 



Digitized by Microsoft® 



