If the dog's milk can express transparent water, it means that the dog may be pregnant or pseudo-pregnant. If the dog has not mated before, it is a pseudo-pregnancy and will also secrete milk. It will take about a month to recover. If you do not plan to let your dog have children, it is best to take your dog for sterilization surgery. Otherwise, your dog will easily suffer from diseases such as metritis or uterine cysts, which will cause great harm to your dog's body. Therefore, sterilization is recommended.