I spoke with a lady from Dogtainers today regarding taking our 2 dogs back to the UK. The lady asked for photographs as one of the dogs may be classed a snub nosed breed as she is a Maltese X Shih-tzu. If she is classed a snub nosed she will not be able to fly with Emirates to Manchester and will have to fly with Qantas to Heathrow. She said they will need to assess with photographs. They will also need weight and size of the dogs. I was told they will assess the best route for the dogs which could mean a 5 day journey if travelling through Emirates with a 2 day stopover in Dubai which I didn't expect.
We have the same concerns as yourself our Spoodle is a nervous dog. We plan to size the dogs for crates through Dogtainers in advance to get them used to it and to use in the car to go for drives and then a nice walk, and to use to sleep in. We want to make sure they know how to have a drink also with the door closed.
A friend of our recently used Dogtainers to take her Golden Retriever back to the UK. His trip took around 7 days in total with comfort stops. He was fine when he arrived and was ready for a long woodland walk, she was amazed!