Pick the smallest kibble your Maltese will chew without swallowing whole, then feed the same complete diet in measured meals. Check the label for an AAFCO complete-and-balanced statement, weigh food in grams, and change only one variable at a time.
That consistency matters more than protein fashion for a 5- to 7-pound adult with crowded teeth and a fast gut transit.
Vets often see Maltese owners rotate foods after two soft stools. In practice, that rotation causes more looseness than it fixes. Hold steady for 10 to 14 days unless vomiting, refusal, or weight loss appears.
Why does mouth size decide the food first?
Choose kibble under about 8 to 10 mm, round or disc-shaped, that breaks with light pressure. Soak a test piece in warm water for 10 minutes. If it stays rock-hard, pick another formula.
Brush daily, offer VOHC-accepted dental chews sized for toy breeds, and schedule dental checks. Crowded Maltese teeth trap plaque, and sore mouths drop food, which owners misread as pickiness. Background on periodontal risk and small-breed mouths is summarized by the American Veterinary Medical Association.
Feed adults twice daily, puppies three times. Measure with a gram scale.
Do not free-feed. A Maltese gains visible condition on 20 to 30 extra kcal per day.
What should you weigh on the label?
Read What the First Five Ingredients Really Tell You before you chase the ingredient list. Look for named animal protein first, moderate fat around 14 to 18% dry matter for most adults, and total fiber that keeps stools formed without constant gas.
Keep a fiber baseline. Pumpkin fiber is a gentle, natural source of both soluble and insoluble fiber, and small, steady amounts may help support normal stool form better than large, occasional scoops. Mixed fibers ferment differently, so avoid stacking powders, toppers, and high-fiber treats at once.

A balanced gut microbiome supports overall immune function.
That sentence sets the limit. Food and prebiotic fiber may help support the gut environment, but they do not reprogram immunity or fix dental crowding.
Where is the gut evidence strong, thin, or mixed?
Strong: portion control and slow transitions prevent most soft stool. Follow a 7-day switch and review How Much New Food to Mix In When Switching Dog Food.
Thin: strain-specific probiotic claims in toy breeds. The mechanism is plausible, the dose-response in Maltese is not settled.
Mixed: fermentable fibers. Different fibers shift fermentation differently in the lab, so judge by stool, flatulence, and intake over two weeks, not by marketing.
Keep water fresh and separate from food. Weigh weekly.
When is this steady-small-kibble plan the wrong call?
Skip the stay-the-course rule if your Maltese loses more than 5% body weight in a month, refuses food for 24 hours, vomits repeatedly, has bloody stool, or has persistent bad breath with drooling and pawing at the mouth. Then call your veterinarian promptly for dental, metabolic, and diet workup rather than adding supplements. General label rules for complete diets and feeding claims are explained by the U.S. Food and Drug Administration.
If homemade meals are part of the plan, read How to Balance a Homemade Dog Food Diet and keep the kibble size and weighing rules above.
Next step: weigh tonight’s dinner in grams, write it down, and repeat it unchanged for seven days.
Sources
- Pet Dental Care — American Veterinary Medical Association
- Pet Food — U.S. Food and Drug Administration