Chemical analysis for weedy forbs like redroot pigweed, lambsquarter, ragweed, dandelion, white cockle, and even immature Jerusalem artichoke have a comparative nutritional value to cool season grasses. Smartweed, shepherd's purse, and yellow rocket, on the other hand, have very low nutritional value for livestock.
What plants are poisonous to cows?
Fact Sheet: Poisonous Plants For Cattle
- Lupine.
- Death camas.
- Nightshades.
- Poison hemlock.
- Water hemlock.
- Larkspurs (tall and low)
Is smartweed toxic to horses?
And yes their are poisonous weeds for livestock. Looks like Smartweed to me....not hazardous if it is. There are an amazing number of broadleaves that are somewhat poisonous, but generally never cause a problem. Several years ago a horse person had some very sick horses, can't remember if they lost any.
