What are the symptoms of foot-and-mouth disease in cattle?

After cattle develop the disease, the sick animal's body temperature rises to 40 to 41 degrees, appetite decreases, drooling occurs with white foam, the mouth is closed, and mouth temperature increases. Blisters of varying sizes appear on the tongue surface, upper and lower lips, gums, hooves, udder, and other areas. After about a day, the blisters rupture and form edges that gradually heal, and the systemic symptoms gradually improve. Most calves do not show blisters, mainly manifesting symptoms of hemorrhagic enteritis and myocarditis and dying suddenly, with a very high mortality rate. Because foot-and-mouth disease spreads quickly and causes great harm, sick cattle are generally not treated when discovered; instead, measures are taken to cull sick cattle and cattle in the same herd to control and eradicate the outbreak.