Tips for HOW to stop your dog from marking. Kristi Benson, a certified dog trainer, says the best approach to stopping a dog from marking is two-fold: prevent, and train.. Prevention means that dog owners must carefully prevent their dog from lifting a leg inside using crates, leashes, or ex-pens, at all times for up to three weeks.This feels dreary, and in fact, it is dreary, but the end product is so worth it!