How to help my Yorkie sleep on a plane without hyperactivity?

There is a natural non-prescription daily supplement called VetriScience Composure chews (they have a liquid version as well) that is available on PetCo.com, chewy.com, and 1800petmeds. Many owners whose dogs previously had severe thunderstorm anxiety, separation anxiety, anxiety during car trips etc. have reported in reviews available on the product online that it has worked wonderfully without an excessive sedative effect that can be seen with certain other prescription medications. I recommend trying it in advance (30 min -1hr in advance) during instances where Finn is usually excitable, anxious or hyper. If it does not seem to work, there are other prescription sedatives that your vet may be willing to prescribe such as trazadone which can be used along with composure and which may not have the unexpected effect that Xanax had of causing hyperactivity. Good luck!