430 STABLE MANUAL AND HORSE DOCTOR 



extensor of the hock, and is a sign of heavy work, though 

 often not accompanied b}^ decided lameness. Thorough-pin, 

 when not interfering with work, is not unsoundness, though 

 a serious diminution in market value. 



Thorough-pin and bog-spavin often exist together, and 

 then the fluid can be pressed from one to the other, though 

 not readily. These thorougb-pins are generally produced 

 by the sudden violent straightening of the limb ; whilst bog- 

 spavin is probably caused by its sudden bending. 



Mr. W. Spooner says : " I have, however, known a 

 troublesome and obstinate lameness produced from the 

 upper thorough-pin, or perhaps rather from some strain 

 of the tendon which attended it. It gave way, however, 

 at length, to a seton placed over the part — not through it. 

 I have also succeeded in removing a very large thorough- 

 pin in the lower situation, in a high-class race-horse, by the 

 long-continued application of equal parts of iodine and 

 mercurial ointment, previously, however, stimulating the 

 part with a mild liquid blister. The subject was a race- 

 horse of great value ; and the thorough-pin entirely dis- 

 appeared in about ten weeks. In some cases the synovial 

 fluid in the thorough-pin coagulates, and becomes organised 

 and firm." 



III.— The Hind Legs, Pasterns, and Fetlock Joint. 



MALLENDERS AND SALLENDERS — SWELLED LEGS — GREASE — 

 WEED — SPRAIN OF THE FETLOCK JOINT — HALTER-CAST 

 — WIND- GALLS. 



Mallenders and Sallenders.— On the inside and front of 

 the hock, or a little below it, is often found a scurfy erup- 

 tion called Sallenders ; and a similar one on the back part 

 of the knee bears the fantastic name of Mallenders — words 

 of which the derivation is unknown. Their treatment is 

 identical, and will be found under Diseases of the Skin. 



SWELLED OR " FILLED " LEGS. 



This common grievance of the stable is commonest among 

 coarse and heavy horses, though the exactions of the 

 animal's hard taskmaster, man, render the best-bred ones 

 subject to the visitation. The hinder limbs, below the 



