Dogs cannot urinate or defecate regularly or female dogs need to use diapers during their pregnancy. The method of use is as follows: choose the size for your dog, put the hole in the diaper on the dog’s tail, and then remove it from the dog. Pull the diaper flat with the dog's hind legs to the abdomen, stick it according to the dog's waistline, and then pull the leg hair and the hair around the anus out of the diaper.