Scientists at Utah State University have discovered that animals choose what to eat based on feedback from nutrients and toxins in foods. That means the more nutritious a weed is, the more likely the animal is to eat it. It's a good thing that some our biggest problem weeds are just as nutritious as alfalfa!

Keep in mind that all plants contain toxins. Toxins reduce the amount an animal eats of that plant, but rarely will they kill an animal outright. Before you start, be sure you know what toxins your plant contains so that you can safely feed it to your animals.

Researchers are also discovering that the effects of some toxins can be offset by particular nutrients (provided by supplements or other forages) or by other toxins. If you don't know what offsets what, don't worry. Simply make sure your animals have plenty of variety to choose from. With choice, they can make the right decisions.

Check out what's edible and the answers I put together to get started