Winston and Cooper are 4 months old and doing very well with their wee pads.  So much so, that they are no longer "crated" when we are not home.  Although they are confined to the kitchem & bathroom.
 
My question -with training for them to adhere to commands such as "Sit", can they be trained together or must the training sessions be individual?  What has been your most sucessful experience when you have multiple pups? 
Thanks in advance for any and all advice.