It is not normal for a cat to poop once every two days. A normal cat needs to defecate about three times a day. If it poops once every two days, it may be caused by constipation or intestinal problems. You can feed the cat some probiotics and let the cat drink more water and diet. You should choose food that is light and easy to digest. If the cat still does not poop, it is best to send the cat to the pet hospital for examination in time to avoid delaying the condition.