It is actually against kc rules to drop the lead,as then you are not in control of the dog,BUT,most people who show breeds like ours do drop them,the 'Yankee' people actually take the whole lead off!!!!! I am only speaking from experience as 2 years ago i lost a very high placing because i dropped the lead on the table when stacking the dog,the judge was kind enough to come to me afterwards and tell me never to let the lead drop,i now tend to put the loop over my hand up to my wrist,then stack the dog.