Hi There

ferrets do get judged on there temper not just for not biting they will loose a point if they wriggle too much so the calmer the ferret the better really. They normally get judged on:

Handlability
Eyes
Ears
Teeth and gums
Nails and paws
Coat and skin
Posture (the way they walk)
Proportions: (how they look ie are they too fat)
colour: how good are they - (each judge is different)
Skull and face (the shape)

each catigory is 10 points so the most a ferret can get is 100 but thats very rare.

I would recomend cutting your ferrets nails a week to ten days but this will really depend on the judge again weather or not they like long nails. You should clean the ears the night before the show and the morning of the show before leaving, you can use cotton balls with warm water on that usually lifts it all out, a little tip if the ferrets live together you could put abit oilve oil in there ears and they will all lick eachothers ears but dont do this on the morning of the show. if you want anymore help then feel free to pm me.