Oh OK that makes sense.  I know in some areas of the world they have rules with ferrets and keeping them.  Did you have any issue keeping it as a pet?
I used to own ferrets. Man I miss having them. Aw sorry to hear it.  Did you know that the word ferret comes from a Latin word meaning little thief?   Apparently ferrets like secreting away small things. THey sure our little theives they always hide stuff under the furniture. Oh really!  Apparently they can have white, black, brown or mixed fur.  What color were yours? Mine were the typical brown ferret color. I loved it when they war danced. They war danced?  I know they have been domesticated for thousands of years, what is their dance like? That's when they hope around like little idoits and play fight. I think the purpose in the wild is that they confuse their prey.
As a result, some parts of the world have imposed restrictions on the keeping of ferrets.