questions:  query regarding  a dairy cow  showing the signs of  dribbling of saliva from mouth with foam  & the cow tries to lick the muzzle & nearby skin at any time 
 answers: wash the external area of mouth with potash solution & spray topicure on the facial region including the muzzle & nostril , inject maleate 10 ml as directed  and  apply eating soda / listerin gel  inside the mouth including the lingua & palet , if the froath is not decline in the above mention procedure  inject arecoline  1 ml  as directed