262 THE farmer's veterinarian 



district is large to the proportion of deaths result- 

 ing from vaccination. Medical treatment for this 

 disease has proven unsatisfactory in the acute form, 

 although in some chronic cases some good results 

 may have been obtained by medical treatment. 



THICK LEG.— See Lymphangitis. 



THOROUGHPIN.— An enlargement situated 

 on the sides and upper part of the hock joint of the 

 horse, arising from a derangement of the sheath of 

 the back tendon. The fluid with v^hich it is filled 

 can be pressed from one side to the other, hence 

 the term thoroughpin. It seldom causes lameness. 

 For treatment mix a teaspoonful of biniodide of 

 mercury with 4 tablespoonfuls of lard. Rub on a 

 little with the fingers, let it remain on for 24 hours, 

 then wash off and rub on a little lard or vaseline. 

 Repeat the blister every third week until the en- 

 largement disappears. The horse should have rest 

 while under treatment. 



THRUSH. — A diseased condition of the secret- 

 ing surface of the fatty frog in the foot. In severe 

 cases the horny part often detaches from the sen- 

 sitive tissue within. Bad shoeing is a common 

 cause of the trouble, or anything else that prevents 

 the frog from coming in contact with the ground. 

 Lameness is sometimes associated with the disease. 

 Treatment consists of careful cleaning, followed 

 with linseed meal poultices if lame. After the foot 

 is made dry, insert calomel into the little cavities. 

 The calomel can be kept in and the dirt kept out 

 by using paper or cloth plugs. Follow this treat- 

 ment until normal condition is attained. 



THUMPS. — This disease is limited in its action 

 to pigs. Its cause is not definitely known. It is recog- 

 nized by a peculiar contraction of the diaphragm 

 in young pigs. While the pig may eat fairly well 



