The story of Tommy passing through US customs with a packet of herrings reminded me of something similar I did in the late 1970's.
I was living in Dublin, Ireland and would be visiting my mentor Eric Sharp in South Wales, where I would also be collecting a van load of props and returning to Ireland by ferry. The customs at the time were very strict and stopped and searched most vehicles, so there was a strong possibility of heavy taxes.
I also wanted to use a rabbit in my show and couldn't locate a suitable one - a Netherland Dwarf. But Eric had a spare one. I also discovered that to import a rabbit into Ireland you needed a special form from the Department of Agriculture.
On returning to Ireland I drove straight to the "Something to Declare" section of customs, explaining I was importing a rabbit and had the necessary documentation. They directed me to the Agriculture section who stamped the form and sent me on my way - just as I had hoped would happen.
I used the same method twice more over the following four years and was then breeding my own rabbits.