However, during hot, dry weather the desirable cool season plants become dormant leaving summer-adapted weeds to populate the pasture. This same situation can develop in an overgrazed, poorly managed pasture where the lack of desirable forage can cause the livestock to eat not only weeds, but also the leaves of woody plants. These can be very poisonous. This keeps them somewhat under control and less likely to be eaten by the animals. It is also a good idea to maintain a supplemental supply of feed, such as hay, in the pasture.
Hungry animals are more likely to eat poisonous plants.
If weeds of any kind are a serious problem, improving pasture management will reduce their pressure. One final note of advice. It is a good idea to keep a watchful eye over your animals and become familiar enough with their behavior to recognize any changes. If you suspect something is wrong, call your veterinarian immediately. Speedy treatment is critical with many disorders, but is doubly critical with suspected plant poisoning.