You should read the "reviews" of this book over at Amazon.

See if this works Sylvia S. Scott is what to search for. Here is a modest example:

I found this book while shopping for my donkeys. Since I don't raise horses, but donkeys, I was worried that the story and illustrations would be too horse-centric for my donkeys. But once I read the book I decided that my donkeys probably won't care that it's about horses, since the story is so exciting and the message so uplifting, even for donkeys. Sure, a horse dies in the book, but I can just tell the donkeys that's what happens to bad horses (and donkeys) when they smoke drugs and drink. "Stay away from the horses!" I'll tell them, since obviously Latawnya's species is too weak and drug-addled to act like responsible donkeys. But there's more to the message as well-- donkeys (and horses) need to think for themselves rather than follow the popular donkeys around. When my donkeys are teenagers and some horse tries to get them on the drugs, they will know better and will say "No thanks, donkeys don't smoke drugs" thanks to this book. What more could the parent of a donkey want? (Other than to get the horses out of the neigh-bor-hood.)

A good message for donkeys AND horses. Thanks to the author for writing such an engaging, important book for all parents of hoofed animals (including donkeys and horses) who are worried about smoking the drugs and drinking the alcohol.