Leo and Knoxx are constant companions for Jenna Huhn and often travel with her to family gatherings and friendly get-togethers. These two canine companions are remarkably well behaved. However, even the calmest dogs can become rowdy or nervous on long plane trips or extended car journeys. In most cases, dogs who are accustomed to crates will readily enter the crate for plane travel. Maintaining a positive attitude during the process can help keep your dogs calm, cool and collected.