─────────────────┬─────────────────┬─────────────────┐ Symptoms. │ In Cerebral │ In Cerebral │ │ Anæmia. │ Hyperæmia. │ ─────────────────┼─────────────────┼─────────────────┤ │ │ │ Pupils. │Usually dilated │Usually small or │ │ and mobile. │ medium. │ Respiration. │Often interrupted│Normal or nearly │ │ by a deep │ so. │ │ breath or sigh,│ │ │ even when at │ │ │ rest. │ │ Activity. │Lassitude. │Restless, but │ │ │ indisposed to │ │ │ exertion. │ Temperament. │Lethargic with │Irritable with │ │ exceptions. │ exceptions. │ Intelligence. │Senses impaired. │Impaired. │ Elevation of │Aggravates │No effect, or │ head. │ symptoms. │ improvement. │ Recumbent, │Amelioration. │Aggravation. │ dependent head.│ │ │ Straining. │Not necessarily │Aggravated. │ │ aggravated. │ │ ─────────────────┴─────────────────┴─────────────────┘ =Cattle= show the same general congestion and heat of the head, ears and horns, congested mucosæ, fixed eyes, and pupils, indisposition to follow the herd, irritability, and dulness with often a disposition to lie down. This may go on to violent bellowing, pushing against the wall, grinding of the teeth, working of the jaws, rolling of the eyeballs, and violent dashing in different directions regardless of obstacles. =Dogs= show the same restlessness and excitability, congested head, eyes and nose, frequent movement from place to place, a desire to wander off, and it may be spasms. If there has been any gastric disturbance vomiting usually supervenes. As in the larger animals the disease may go on to more violent symptoms, and the animal howls, rushes in different directions, and may snap at imaginary objects, or at any one who interferes with him. His movements are liable to be unsteady, uncertain and swaying. In all cases the ophthalmoscope reveals a congestion of the optic disc. In the different animals too, acute cerebral hyperæmia tends to merge early into encephalitis with exudation and pressure, attended by stupor, coma, somnolence or profound lethargy.