 as a treat for training. I'm not a big fan, and here's why. Cheerios are mostly, mostly made from whole grain oats. There's nothing horrible for the dogs. However, there's nothing real beneficial for the dogs as well. Doesn't provide much benefit at all. Basically, they're empty calories for your dog. So again, if you want to give your dog a Cheerio, that's fine. It's not going to hurt him. It's not going to benefit him either. So it's your option anyway.