“疯草”不是一种草，而是豆科黄芪属和棘豆属的一类有毒植物。这一类植物被当地牧民和兽医习惯性称呼为醉马草。这是因为这一类草被牛羊马等动物采食后会有像喝醉酒的行为，甚至死亡。国际上给这一类草命名为“疯草”。近年来“疯草”分布面积和强度不断增大，已经成为危害我国西部草原畜牧业可持续发展的严重毒草。

影片通过西藏一家普通牧户顿珠一家养殖的牦牛采食“疯草”中毒治疗的经历，在故事中贯穿科学知识的同时，展示了人、动物、自然环境的关系，生动讲述了“疯草”是哪一类草？它是如何分布的？牛羊采食这一类草的原因和特点是什么？以及科学分析了疯草致毒的机理。影片科学普及了预防和治疗牛羊“疯草”中毒的新观念和新措施。这些知识的普及和推广将有利于中国以放牧为主的牧区牧民们减少因为牛羊采食“疯草”中毒带来的损失。

Locoweed is not a kind of grass but several species of poisonousplants of the genera Astragalus and Oxytropis, in the pea family. These plants are called "drunk horse weeds"by local shepherds and vets because cow, sheep and horses act like drunk or even get killedafter eating these plants. Locoweed keeps expanding its distribution and popularity these years, becoming major poisonous plants that endangers the husbandry in West China.

The film takes the example of an ordinary Herdsman familyin Tibet, whose yaks were poisoned by locoweed. It presents scientific knowledge and shows the relationship between humans, animals and the nature at the same time. The film illustrates the definition and distribution of locoweed, why cattle like eating these plants and the poisoning mechanism of locoweed. The film popularize the new ideas and measurements in preventing and treating locoweed poisoning, which will help Chinese herdsmen reduce the losses caused by locoweed poisoning.