White vinegar cannot make dogs poop in a specific spot, but it can remove the smell and prevent dogs from pooping in the same location again after smelling the smell. If you want to train your dog to poop at a fixed time, you need to prepare a special dog toilet and inducer for the dog, and then let the dog stay in the toilet for about half an hour after the dog has finished eating, until the dog has finished pooping, and then Reward or praise the dog. If you repeat it a few times, the dog will poop at the right spot. However, it is best to start training when the dog is young, so the effect will be better.