Cranberry Chews

Dogs with long-term urinary incontinence are at elevated risk for UTIs. The urine stays in contact with skin and the urinary opening longer than it would in a continent dog, and diapers, however well-managed, create a warm, moist environment. Cranberry supplements are used by many caregivers and some veterinarians as a preventive measure.

The general thinking is that compounds in cranberry reduce the ability of certain bacteria to adhere to the walls of the urinary tract — making it harder for an infection to take hold. I’ll be straightforward about the evidence here: the research in humans is mixed, and there’s limited formal research in dogs specifically. But many long-term disabled-dog caregivers use cranberry chews as part of their routine, UTI rates in my experience have been manageable, and the product has a very low risk profile. That’s where I land on it.

There is one important side effect to know: cranberry chews cause softer stools. This is noticeable within a few days of starting them. If your dog also has fecal incontinence, softer stools make that significantly harder to manage. This is why we always recommend pairing cranberry chews with a stool hardener — they work as a system. The cranberry chews help with UTI prevention, the stool hardener counteracts the stool-softening effect. See the stool hardener page for the other half of this.

When selecting: look for chews formulated specifically as cranberry supplements rather than generic treats with cranberry flavoring. The active compound concentration matters. Dosing guidance varies by product and your dog’s weight — follow the product label and check with your vet if you’re unsure.

Do not use cranberry chews to treat an active UTI. A confirmed UTI needs antibiotics prescribed by a veterinarian. Cranberry chews are a preventive supplement, not a treatment.