Most livestock poisoning comes in the spring from eating fresh foliage. Ingesting just two to four berries can kill a human child. Fig 2 Cattle with lead poisoning become isolated and depressed. The deadly nightshade lives up to its reputation once humans eat it. Grain overload also is common in feedlot cattle when they are introduced to heavy grain diets too quickly. In cattle, there is evidence that vitamin A storage is affected. Death in 4-8 days. Some plant species are naturally good accumulators of nitrates. Nitrites cause respiratory distress due to interference with oxygenation of blood. Even chewing on just one leaf can lead to a dirt nap. As the disease progresses, cattle become frenzied, bellow, stagger and crash into obstacles. Several systems of the body, such as the digestive system, nervous system, vascular system, and ENT may be affected. It can result in death. Usually, stored forages with less than 1,100 ppm NO 3-N may be fed free choice to cattle. diagnosis and prevention of poisoning of animals by plants and other ... Nightshade family • Pokeweed • Redroot pigweed. The signs and symptoms of Black Nightshade Poisoning can vary from one individual to another. Death may occur suddenly or within days. The symptoms of acute poisoning are trembling, staggering, rapid breathing, and death. Milder symptoms of deadly nightshade poisoning include delirium and hallucinations, which appear quickly once ingested. Nitrate toxicity is basically a form of "anti-quality factor" that is associated with animals consuming plants that have a substance that creates health issues in them, just like with bloat is an anti-quality factor, or sweet clover poisoning, or grass/winter tetany. Understand how cattle can develop nitrate toxicity or poisoning. This is the earliest sign of a possible toxicity occurring with slight to acute symptoms. The Poisonous Plant Guide is constructed to enable location of a plant by either knowing the common or botanical name of the plant. Symptoms: Cattle -- high fever, loss of appetite, weight loss, difficult breathing, salivation, ataxia, opisthotonos, convulsions, internal bleeding; often mistaken for anthrax and other infectious diseases of cattle. nitrite poisoning; Nitrates may cause inflammation of the gut when eaten in large quantities, but their main importance is as a source of nitrite. Mayapple, bloodroot, pokeweed, nightshade and hellebore are other alkaloid-containing plants. Ten to twenty berries can kill an adult. Wheat, barley, and corn are the most readily digestible grains; oats are less digestible. There may be signs of abdominal pain including kicking at the abdomen and frequent teeth grinding. The disease is most common in cattle that accidentally gain access to large quantities of readily digestible carbohydrates, particularly grain. Alternative levels are indicated in Table 4 and the text. They are rarely eaten except when animals are starving for better feed. Acute symptoms may include rapid breathing, incoordination or staggering, and signs of suffocation. It may be mild in some and severe in others. The Colorado State University Guide to Poisonous Plants database lists trees, shrubs and perennials that can be harmful to animals. Chronic poisoning may result in poor growth, poor milk production and abortions. Plants With High Toxicity.