Dogs are rarely the subjects of simple coryza, though it is constant in
distemper. It sometimes proves troublesome in puppies and old dogs. A
laxative (½–1 ounce castor oil) may be followed in strong and very
feverish cases by tartar emetic (¼—½ grain) three times a day. Spraying
or sponging the nose with a weak solution of chlorate of potass, common
salt, or potassium permanganate will greatly relieve. Inhalation from
burning sulphur, or from carbonate of ammonia, or both may be used when
sponging or spraying is difficult. In inveterate cases, the weak
electric current sent through the cheeks, or the insufflation of
acetanilid, iodoform or calomel may be tried. As a rule, saltpeter in
five grain doses, given in the water, will prove helpful, and in weak
conditions wine, tincture of gentian or nux vomica may be used.