I have wondered this same question. I gave my goats some left over beet juice thinking it would be really good for them and also gave them the peelings. After, I gave it to them, I looked it up on the comp. to see what health advantages it would give them. To my horror, I read beets can kill goats. I was in a bit of a panic and all I could do was wait it out. They did fine, I never noticed any adverse reactions. So I don't know if they just didn't get enough to cause problems or if maybe I just read some bad information. I am curious to know if someone can answer this question.