Most cats defecate once a day; some cats, twice daily. It wouldn’t be unusual to skip a day, but you should be concerned if there has been no stool production after two days, says Tufts veterinary internist Michael Stone, DVM. Infrequent or difficult evacuation of dry, hard feces are “red flags to which owners must pay attention,” he says.
Chronic constipation can lead to a condition called obstipation, which means the cat is no longer able to defecate at all. And that, in turn, can cause megacolon — severe dilation of the colon. In some cases, surgery is then required to remove the colon altogether.
Don’t let it get to that point. Caught early on, feline constipation can often be corrected with a change in diet recommended by a veterinarian, oral medications, and, if necessary, removing a colonic obstruction.