The most dreaded visitor on a poultry-farm is roup, for it not only affects the bird during the period of immediate illness, but it leaves behind it all sorts of constitutional weaknesses to the bird’s progeny. Every poultry-keeper should cultivate the habit of scrutinising his or her flock at feed-times. A suspicious-looking bird should be caught and removed to quarantine quarters immediately. The symptoms of cold, influenza, canker, diphtheria and roup are in the earlier stages almost identical--watery eyes, sneezing, discharge from the nostrils or the nostrils being stuffed up (the nostrils are the two small holes at the base of the bill). When the bird is noticed to have any one of these symptoms, open the bill and look down the throat. Should there be no signs of trouble, you may be sure that there is nothing but an ordinary cold to fight, which a few days in hospital will cure. Give light and easily digested food, such as stale bread soaked in scalded milk and squeezed almost dry or corn-meal which has been well steamed. Put ten drops of spirits of camphor on a lump of sugar, then dissolve the sugar in a half-pint of water and use in the drinking-cup. If, however, examination reveals yellow spots on the mouth or in the throat, or a thick slimy discharge from the eyes and nostrils, it is a serious case of catarrh or roupy cold, which may, if neglected, develop into malignant roup. Throughout the entire range of cold and roupy diseases there is no special odour until malignant roup is positively developed. Then there is a most offensive and unmistakable odour. Treat all diseases which overstep a common cold as roup, and you will err on the side of safety. In the last and most malignant stages of roup, the face and eyes or head are very likely to be severely swollen, and if things have progressed to such a condition, before the bird has been removed from the flock, it is well to take the precaution of disinfecting the drinking and feeding dishes and generally clean up the poultry-house, and add a disinfectant to the drinking-water for a few days. Permanganate of potassium is what I generally use, because it is cheap and most effective as a germ-killer. Dissolve one teaspoonful in a quart of warm water, and you will have such a strong solution that for all ordinary uses can be diluted again at the rate of one teaspoonful to five of water. Treatment for roup: First wash off any discharge which may have accumulated around the eyes and bill with warm water and permanganate; then fill an atomiser with diluted permanganate solution and thoroughly spray the throat and nostrils. Repeat night and morning, as long as there seems any necessity. Keep the light diet as recommended for common cold.