The following information was obtained by Ped MD. Take note if your cat has diarrhea. My cat Millie and been pooping a little soft and more frequently for the past couple of days. She is eating and drinking normally but I’m still a bit concerned since she is 18 1/2 years old.

Diarrhea in cats is a common symptom of many diseases, and it is never normal. The causes range from harmless to deadly.

Kittens, senior cats, cats with chronic disease, and pregnant cats are all at increased risk of death-related to complications from untreated diarrhea.

If diarrhea is not self-resolving within a 24-hour period, especially in these populations, you should seek out veterinary care.

Stool consistency suggests the degree of severity to your veterinarian. Liquid diarrhea is concerning because it dehydrates and malnourishes an animal quickly. Soft, formed stool is generally less severe but should still be assessed by a veterinarian.
What Causes Diarrhea in Cats?

Cat diarrhea can be acute or chronic, and there are different sets of possible causes for each.

Acute means that the diarrhea just happened suddenly or doesn’t go on for long period of time. Chronic diarrhea is characterized as lasting for two to three weeks or longer.