Am going on holiday in summer and don't know at the moment if it will be in car or on train. I know ShyDog is good in cars but don't think she has ever been on a train and I have never taken a dog on a train.
Do I need to book them a ticket?

Where do you sit/stand on train with them?
If I were considering it I would do a little short train journey to see how she got on. It's months away yet and I may even get a house sitter yet leaving her cosy at home but am trying to fully explore all options. :-)