CHRONIC CATARRHAL ENTERITIS IN SOLIPEDS. Causes: As in acute: troubles of circulation, heart, lungs, verminous embolism, parasitism, skin disease. Lesions: thickening of mucosa, pigmentation, rigidity, hypertrophy of villi, follicles and glands, ulceration, polypi. Symptoms: impaired appetite, buccal fœtor, retracted flank, unthrifty skin, pallid mucosæ, colics, tympanies, rumblings, irregular bowels, emaciation, perspiration, fatigue. Treatment: dietetic, tonic, bitters, salines, aromatics, enemata, bismuth, laudanum, calomel and chalk, iron, astringents, counter-irritants, electricity, sunshine. _Causes._ This may occur from a continuance of the same causes as in the acute, or from an imperfect recovery from the acute form. It may result from troubles in the circulation, as valvular disease of the heart, or emphysema of the lungs, which forces the blood back on the venous system, including the liver and portal vein. Or the lesions that come from verminous embolism may leave such alteration in the intestinal walls as entail chronic congestion of the mucosa, or intestinal parasites may be the cause. Severe and inveterate skin diseases appear to affect the intestinal mucosa by sympathy, just as diseases of that mucosa usually entail skin diseases. _Lesions._ Attenuation of the coats of the small intestine and thickening of the mucosa of the large have been noticed. The mucosa is darkly pigmented and covered with excess of mucus. The thickening of the mucosa may extend into the submucous tissue, giving a firm leathery feeling to the part, and entailing a loss of elasticity. The villi are hypertrophied and the follicles of Lieberkuhn and Peyers’ patches may be congested, ulcerated or otherwise altered. Polypoid growths are not uncommon on the mucosa, and the mesenteric glands are enlarged and pigmented. _Symptoms_ are by no means very definite. Disturbance of the digestive functions, capricious or impaired appetite, dry fœtid mouth, tucked up abdomen, dry hair and skin, pallor of the visible mucous membranes, slight intermittent colics and tympanies, loud rumblings in the bowels, and relaxed bowels, or alternate costiveness and diarrhœa, with some tenderness on manipulation of the abdomen are the usual symptoms. The animal loses flesh, has dry, unthrifty coat, and sweats and is easily exhausted at work. _Treatment._ Dietary care is the first essential. Boiled oats, barley, rye or bran, in small amount and flaxseed tea may indicate the kind. These should be given in small amount often, and at regular intervals. A failing appetite may be stimulated by nux vomica (10 grains) twice daily, or by gentian or other bitter, along with common salt and aromatics.