They are 4 weeks old and they smell. I'd like to give them a bath before owners come and get them at 6 weeks, but I would give them one now too if I knew it wouldn't hurt them because they are smelly!
My bad! I would like to apologize for putting that I was going to sell them at 6 weeks. I will wait 8-10 weeks. Thank you to everyone who caught my mistake! Also thank you to everyone about suggesting the baby wipes!
That being said, use baby wipes. I would not recommend bathing a puppy any earlier than 6 weeks and would prefer you wait until 8 weeks. They should not be that smelly unless their play/sleep area is not being kept clean.