I tried to keep the pips visually similar enough to classic suit icons that a quick glance would tell you which was which, while making them things that are related to the ferrets I used to own. Clubs have become Kibble, Spades are Litter Scoops, Hearts are Fuzzy Blankets and Diamonds are Plastic Eggs.
The face cards and Joker are all hand-drawn reversible ferret royalty. The back of the cards is a diamond pattern with ferret footprints.