EDWARD COOK says: Dark polecats are becoming a bit more common, but I have to confess the really dark ones I’ve come across carry wild polecat blood.

Ferrets do come in all sorts of colours but I would say the most common are polecats, albinos or silvers.

Got a question? Contact: sportinggun@ipcmedia.com or Sporting Gun, PO Box 157, Stamford, Lincolnshire PE9 9FU