Let me tell you guys why the dog might be banned. First let me say that the principal might have been a jerk, but I don't know for sure. I wasn't there. I have a friend who is also blind who told me a story about an experience she had with her guide dog. Her dog was leading her across a busy street, when some moron began throwing scraps of pizza out his car window at the dog. It's lucky my friend wasn't killed in the middle of that busy intersection. I've also spoken with several people who complain that coworkers mess with their dogs while at work. If so many adults are this stupid, then how can you expect better from kids? If that dog is in a preschool class, the handler will actually learn less. Other kids will always want to pet and feed the dog, some of them will throw stuff at it, and so on. If the boy needs a seizure dog to avoid a trip to the ER that's understandable. Otherwise I think he should wait till he's at least a little older. It takes someone of real maturity to refrain from petting a service dog while the dog is in harness.