Hello Cuevuebout41
Firstly, you have to select a connection. Secondly, you have to enter the passenger data, only then the booking engine can calculate the ticket cost.
There are still seats available in the seating car, for CHF 86, or in the couchette car; the latter is a car with seats which can be transformed into beds, for CHF 124. The most comfortable train car, the sleeping car, is no longer available.
You have to book the seats soon, the train is quickly sold out.
Also, you have to check with ÖBB, the operator of the train as dogs are not allowed in seating and couchette cars. Please check with their customer service if you can take the dog with you before booking the tickets.
https://www.nightjet.com/en/angebote/mit-haustieren-verreisen
Kind regards,
Roland