Dogs are born with the instinct to eliminate in specific areas as a way for them to mark their territory and convey messages. If your dog doesn't poop on the pad, it may be because they think the pad is not a suitable place to relieve themselves. This may be because the pad is in an inappropriate location, such as being too noisy or not private enough, making the dog feel uneasy.

In addition, health problems may also be one of the reasons why dogs don’t poop on the pee pad. If your dog has constipation, diarrhea, or other digestive issues, it may affect their elimination behavior. If the dog does not poop on the pee pad for a long time, it is recommended to consult a veterinarian for examination in time.