Now, that makes little sense. How would stuffing a service dog trainee in cargo train it for practicing its service role on a plane trip? You might, in doing your research, look to the Air Carrier Access Act, which you did not mention as a source of your information, for the laws that govern most phases of service dog airline travel for a more complete view. When I joined other service dog handlers on a service dog training cruise the instructor brought her own (older) service dog plus a dog that was being trained to replace him eventually. The trainee certainly did not ride in cargo as it would not have been able to perform its service role, which is the whole point of having a service dog...