The Diseases of Hens.
These are not numerous or complicated, and may be mostly avoided by proper treatment and food, which are indicated with sufficient minuteness in the foregoing observations.
Gapes or Pip is generally owing to drinking unwholesome or dirty water. Remove the white blister on the tip of the tongue, and wash with sharp vinegar, diluted with warm water; or compel the bird to swallow a large lump of fresh butter, mixed with Scotch snuff. It has been cured by opening the mouth and forcing a pigeon feather, with a tuft of the feathers left on the end, (the others having been stripped off,) down the windpipe, and gently turning it as withdrawn, to be repeated the following day if necessary. This detaches large numbers of a slender red worm, collected in the larynx of the throat, which impedes respiration and swallowing. A little spirits of turpentine mixed with the food is a preventive; as are also clean, whitewashed premises, and good food. After these attacks, feed for a few days with light food, soaked bran and cabbage, or lettuce chopped fine.
Roup, Catarrh, or swelled head, is shown by feverish symptoms, swollen eyelids, frequently terminating in blindness, rattling in the throat, and temporary strangulation. These are accompanied with a highly offensive watery discharge, from the mouth and nostrils, loss of appetite, and much thirst. They should be placed near the fire; their head bathed in warm Castile soap-suds, or milk and water. Stimulating food, as flour or barley-meal, mustard and grated ginger, mixed and forced down the throat, Boswell says, has been effectual in their speedy restoration. This, like many other diseases, is contagious, and when it appears, the bird should be at once separated from the flock.
Flux is cured by the yolk of an egg boiled hard; and boiled barley soaked in wine.
Costiveness is removed by giving bran and water with a little honey; or give a small dose of castor oil.
Vermin are destroyed by giving them clean sand and ashes to roll in, adding a little quicklime if necessary.
Entire cleanliness is necessary for the avoidance of this and other diseases. A perfectly dry range is also essential, nor should there be too many together, as this is a fruitful source of disease.