It is well to keep birds isolated for some time after apparent recovery. When the eye is affected (see Fig. 20), the tumor should be carefully lanced and the cheesy matter removed, after which the cavity should be rinsed out with one of the disinfectants recommended above; such treatment may have to be repeated time after time. [Illustration: FIG. 20.—A ROUPY EYE] As an after effect of a cold or of roup, conjunctivitis or sore eyes may develop. A discharge comes from the eyes and the eyelids become stuck together. Bathe the eyes with hydrogen peroxide mixed with an equal quantity of water. If this condition follows an attack of roup, there is danger that the fowl has not entirely recovered, and may be a source of infection to the rest of the flock. SCALY LEG _An unsightly affection that, although contagious, does not spread rapidly_ _Symptoms._ A rough and scaly growth on the legs of the bird. [Illustration: FIG. 21.—SCALY LEG A. Showing early stages of attack.] _Cause._ A small mite (Fig. 22), known as _Sarcoptes mutans_, burrows in the skin and gives rise to the unsightly growth (Fig. 21) that gives this disease its name. _Treatment._ Soften the scaly growth by washing and soaking the legs with warm water and soap. Scrub the affected portion of the legs with a brush and then treat as follows: Dip the legs in kerosene oil, holding them there for not longer than a few seconds. If the kerosene oil is mixed with sweet oil, or if the legs are wet first with water, there will be no risk of the kerosene proving harsh, as sometimes happens. Sulphur ointment (see page 9) may be used instead of the kerosene oil treatment. [Illustration: FIG. 22.-THE MITE THAT CAUSES SCALY LEG] SOFT CROP _Not a serious complaint_ _Symptoms._ Distended crop, soft to the feel. _Cause._ Over-eating; or food turning sour in the crop. _Treatment._ Hold bird downwards and squeeze contents of crop through mouth, taking care not to suffocate the patient. Repeat treatment if necessary. Put on low diet for some time, feeding slowly and sparingly. TICKS _A pest found in the Southern States and tropical countries_ _Symptoms._ The fowl has fever, appears depressed, and stands in a cramped position. [Illustration: FIG. 23. THE FOWL TICK _a._ Adult. _b._ Larva.] _Cause._ The fowl tick (_Argas minatus_), which hides during the day in cracks and crevices, sucks the fowl’s blood at night and introduces a fever-producing parasite. _Remedies._ Examine sick birds during the day, and visit the roosts at night, for proof of the presence of ticks; carefully search under perches, in nests, and in corners of woodwork, etc. Spray woodwork with 5% creolin; squirt kerosene oil, or turpentine, into cracks and crevices. TUBERCULOSIS _A very serious poultry disease_