I might have to give the cattle transportation a miss!!!
I think that a 10 x 6 with cage would be far better for your needs...
Cattle handling is a job for those who have many years experience.
if they are sick, you call a rural vet, they come to you. If you want them removed prior to fire, or other natural disaster, you call a livestock carrier.
Your reply came before I was going to ask for a clarification... what sort of emergency..
Shoot me a PM if you ever need some rural advice...
Cheers, Al.