If your 4-week-old puppy is soiled, you can spot-clean them with a gentle, warm, wet cloth. Avoid using harsh soaps or shampoos, as these can irritate their skin.
It is best to wait until your puppy is at least 8 weeks old and has received their first round of vaccinations before giving them a full bath. This will help ensure that they are strong enough to tolerate the bathing process and are less likely to become ill.