Small breeds are genuinely more prone to selective eating than larger dogs. Most cases come down to routine, food freshness, or mild boredom, not a serious health problem, but it’s always worth ruling out a medical cause first.
According to Dr. Jerry Klein, Chief Veterinarian for the American Kennel Club, some breeds genuinely have heartier appetites than others, and eating habits are also shaped heavily by environment and routine, not just genetics. Small breeds like Shih Tzus, Yorkies, and Chihuahuas are frequently described as more selective eaters than food-driven breeds like Labradors.
Dr. Jennifer Coates, DVM, writing for PetMD, recommends ruling out medical causes before assuming a dog is simply finicky: a vet exam of the teeth, gums, and a physical check can catch dental pain, nausea, or other issues that look exactly like pickiness from the outside. Contact a vet promptly if a Shih Tzu refuses food entirely for more than 24 hours, or if a normally enthusiastic eater suddenly goes off their food, since sudden changes are more likely to signal a physical cause than a preference shift.
What to Do If Your Shih Tzu Is a Picky Eater
Once a vet has ruled out a medical cause, these are the changes that make the most consistent difference for a genuinely picky small breed:
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Set a consistent feeding schedule The AKC recommends sticking to a mealtime schedule as one of the most effective ways to prevent picky eating behavior in the first place. Two to three meals a day at predictable times gives structure that free-feeding doesn’t.
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Offer the food, then remove it Set the bowl down for about 20 to 30 minutes. If it goes untouched, pick it up and offer nothing else until the next scheduled meal. This is the single most cited technique across veterinary sources for correcting learned picky eating.
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Stop the table scraps and free treats If a Shih Tzu learns that skipping dinner earns a better offer later, they’ll keep skipping dinner. A consistent, united household approach matters here more than any specific food change.
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Add a small amount of wet food or a warm topper Mixing a small portion of wet food into dry kibble, or lightly warming a meal, increases its aroma and can make it noticeably more appealing without unbalancing the diet.
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Reduce mealtime stress Hovering and watching a dog eat adds pressure that can genuinely put a nervous eater off their food. Set the bowl down in a quiet spot and give them space.
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Check the food and bowl themselves A dirty bowl, stale kibble, or a recently opened bag past its best freshness can all be enough to put a small dog off eating. Clean the bowl regularly and store food properly.
Why Is My Shih Tzu a Picky Eater?
A handful of overlapping factors usually explain selective eating in this breed:
Shih Tzus are prone to dental crowding and periodontal disease, which can make chewing kibble genuinely painful.
Nausea, food sensitivities, or GI discomfort can look exactly like a picky phase from the outside.
A new home, a change in routine, or a new family member can temporarily reduce appetite.
Eating the exact same kibble every day, every meal, can genuinely lose its appeal over time.
If holding out has reliably earned better food before, a dog will keep holding out.
Small breeds are simply more likely to be selective eaters than large, food-driven breeds as a general pattern.
A note specific to Shih Tzus
Because Shih Tzus only need a small amount of food each day, it can be harder to tell normal pickiness from a genuine appetite change, since even a few skipped bites represent a larger share of their daily intake than they would for a bigger dog. Weigh a Shih Tzu periodically and watch for weight loss, a dull coat, or lethargy alongside reduced eating, since those combined signs are what should prompt a vet visit sooner rather than later.
Products That Can Help
None of these fix picky eating on their own, routine matters more, but they can make mealtimes more appealing once the basics are in place.
This kibble’s shape is specifically designed to be easier for a Shih Tzu’s short muzzle and underbite to pick up and chew, which can matter for a dog that struggles with standard kibble shapes.
View on Amazon amazonMixing a small portion of this into dry kibble is exactly the kind of aroma and texture boost PetMD recommends for a finicky eater, without replacing the balanced dry diet entirely.
View on Amazon amazonA simple way to add aroma and moisture to plain kibble without changing the whole diet. Warming water slightly before mixing it in can boost the effect further.
View on Amazon amazonFrequently Asked Questions
No. Eating is a primal instinct, and a healthy dog will not deliberately starve itself. That said, appetite levels vary a lot between individual dogs and breeds, so some dogs are simply less food-driven than others by nature.
This varies by dog, but most veterinary sources recommend seeking veterinary advice if a dog refuses food for more than 24 to 48 hours, and sooner for puppies, seniors, or dogs with existing health conditions, since they have less reserve to draw on.
Yes. Warming food releases more of the aromatic compounds dogs use to detect food, which can meaningfully increase its appeal. A few seconds in the microwave or a small amount of warm water mixed in is usually enough.
Not immediately. Most veterinary guidance suggests addressing routine and ruling out medical causes first, since randomly switching foods often doesn’t resolve behavioral picky eating on its own. If a switch is warranted, introduce any new food gradually alongside the old to avoid stomach upset.
The Bottom Line
Most picky eating in Shih Tzus comes down to routine, freshness, and a bit of learned behavior rather than a serious problem, but it’s always worth ruling out dental pain or an underlying health issue with a vet first. From there, a consistent schedule, a firm approach to skipped meals, and the occasional appealing topper solve the large majority of cases.
Cooper still has his opinions about dinner some nights, but a steady routine and the occasional spoonful of wet food mixed in have made mealtimes a lot less dramatic around here. 🐾
