(132.) _Staggers._ The symptoms nearly resemble those of sturdy, which I have afterwards to describe, and with which indeed I might have classed it, were it not that it appears to be merely the result of a poisonous plant being taken into the stomach. It is rarely seen hereabouts; I shall, therefore, quote the account of it presented to the Highland Society by Mr Stevenson:--"This is a disease seldom or never affecting the sheep in this country, those excepted which feed in forests, or amongst planting. The symptoms of it are more violent than those of sturdy, during the time of their continuance. The animal, after staggering for some time, falls on the ground, when a general trembling comes on over the limbs; they are violently convulsed, and quite insensible to every thing. During the continuance of the paroxysm they throw the body into various positions, and sometimes roll to a considerable distance. The fit continues for a quarter, sometimes half an hour, or an hour. When they rise, they seem perfectly bewildered, till they regain the flock, when they continue to feed well, till another paroxysm supervenes. This disease appears in Autumn, and various causes are said to produce it. Improper food, the leaves of the oak, from their astringent quality, cobwebs sprinkled with dew, have all been reckoned as causes. I am inclined, however, to suppose, that it arises from the action of a poisonous grass (_Lolium temulentum_), which is the only one of that description in this country, and grows only in those situations where staggers prevail. What effect these causes have on the brain to produce this disease, I cannot explain. When it continues for any time on the same individual, it is apt to be fatal." "Change of pasture is the only effectual cure for it." (133.) _Diarrhoea._ By this is meant a constant purging, affecting the younger portions of the flock between April and June, leading to great emaciation, and proceeding from one of the following causes. 1st. Eating a soft tathy pasture, particularly if fouled by the inundations of the previous winter. 2d. Feeding on too rich a pasture, or a sudden change from an herbage deficient in nutritive qualities, to one that is much superior. 3d. Transitions from heat to cold. 4th. Weakness and relaxation of the bowels. (134.) _Treatment of Diarrhoea._ When either of the first two causes has given rise to purging, a moderate allowance of good hay will gradually stop it. This may be discontinued when the sheep has _taken_ with its altered fare.