In the UK, I have had experience of using Roy Smith (Interzoo) and I have always found him to be both very experienced and knowledgeable, I find it hard to believe these animals were not provided with what they require for the journey.
Another aspect to the transfer is that these animals were actually meant to go on to a private facility, not the zoo, however the zoo failed to make that clear and claimed they were for them. This is nothing against the private facility involved BUT the problem is the zoo lied about their real destination and that was the problem, both zoos involved should adhere to the regulations laid down by the authorities and they simply did not do that.
The whole situation was a disaster from start to finish, it is only tragic that the poor animals caught up in it suffered as a result of bad planning and lies.