I've never fed beet pulp or seen it. Supposedly Bay ate beet pulp when he was doing endurance. Bob said he had gone over there and made some comments to her about how lean he was, to which she got defensive and said "no, he's just not fat any more like he was when you had him". Anyway, they got around to talking about beet pulp and Bob decided she was nuts :~) I told him it was not all that uncommon.
I've heard alot about people feeding it, of course... is it red, like beets?
No, it isn't red, it's gray, very dry, shredded crap. You can also buy it in pellets, I think. I buy the beet pulp shreds with molasses added to it. Makes it a little more palatable.