This is all I would need to know to get my money back! This is all you would need legally. According to the article below, the cocklebur seed is fatal at .03 percent of an animal's body weight. A 1000 lb cow eating 30 lbs of cocklebur seed is not going to happen. A man that takes in small amounts of poison, that is not a lethal dose, it does affect him, and he is able to tell you how it is effecting him.
I would worry that a low daily consumption of this would be affecting my herd the opposite direction I was heading.
http://www.fs.fed.us/database/feis/plan ... r/all.html
SEND IT BACK!!!
IMPORTANCE TO LIVESTOCK AND WILDLIFE :
Common cocklebur is considered a nuisance by livestock producers. The
plant grows in barnyards, pastures, and around farm ponds where it is
commonly encountered by livestock. The spine-covered burs become
entangled in the hides of farm animals. Wool value is decreased if
entangled with common cocklebur [32].
Common cocklebur seeds and cotyledon leaves are poisonous to all classes
of livestock. Beyond the cotyledon stage, plants are not poisonous.
Consumption of seeds is fatal at about 0.3 percent of an animal's body
weight; however, the seeds are rarely eaten.