Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A Shih Tzu puppy’s tiny mouth and sensitive stomach make picking the right bag of food the first real test for any new owner. The wrong kibble size can lead to choking, and the wrong recipe can mean loose stools or picky eating. This guide compares five small-breed puppy formulas on the specs that actually matter for your little companion: kibble size, protein sources, and digestive-health ingredients — so you can stop second-guessing and start feeding with confidence.
I’m Mohammad Maruf — the founder and writer behind WellFizz. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Every option here is a small-breed puppy formula designed for a growing toy breed, and this breakdown of the very best dog food for shih tzu puppy owners covers what each brand actually delivers and where it falls short.
Quick Picks
- Now Fresh Grain-Free Small Breed Dry Puppy Food with Turkey, Salmon & Duck — Best Overall
- ORIJEN Grain Free High Protein Dry Dog Food Small Breed Puppy Recipe — High Protein Growth
- Blue Buffalo Life Protection Formula Small Breed Puppy Dry Dog Food — Best Value
- NutriSource Small & Medium Breed Puppy Dry Dog Food — Gut Health Pro
- Royal Canin Size Health Nutrition Small Puppy Dry Dog Food — Veterinary-Inspired
How To Choose The Best Dog Food For Shih Tzu Puppy
A Shih Tzu puppy isn’t a mini version of a Labrador. Their flat face (brachycephalic skull), tiny jaw, and notoriously sensitive digestion mean you need a formula built for toy breeds — not just any bag marked “puppy.” Here is what to look for.
Kibble Size and Shape
Shih Tzu puppies have small mouths and can struggle to pick up or chew oversized kibble. Look for kibble described as “tiny” or “small breed” — ideally with a diameter under 8-10 mm so your pup can grab and crunch without frustration. The ORIJEN Small Breed Puppy’s kibble comes in at 6-7 mm, which is about right for those tiny teeth.
Protein Source and Ingredient Sensitivity
The first ingredient should be a named protein — chicken, turkey, salmon, or duck. If your puppy has a sensitive stomach, a chicken-free recipe (like the Now Fresh option with turkey, salmon, and duck) can reduce the risk of food sensitivities. Avoid vague terms like “meat meal” or “poultry by-product” unless you know the source.
Digestive Health Additions
A Shih Tzu’s delicate gut benefits from prebiotics and probiotics. These help maintain healthy stool quality and reduce the chance of loose stools during the transition from the breeder’s food. Pumpkin, sweet potato, and chicory root are signs of a recipe that prioritizes digestive stability.
Quick Comparison
| Model | Best For | Kibble Type / Size | Protein Source | Bag Weight | Amazon |
|---|---|---|---|---|---|
| Now Fresh Small Breed Puppy | Chicken-Free Sensitive Stomachs | Tiny kibble | Turkey, Salmon, Duck | 3.5 lb | Amazon |
| ORIJEN Small Breed Puppy | High-Protein Growth | Square kibble, 6-7 mm diameter | Poultry, Fish, Organs | 4 lb | Amazon |
| Blue Buffalo Small Breed Puppy | Balanced Value with DHA | Small-breed granule | Chicken | 15.16 lb | Amazon |
| NutriSource Small & Medium Puppy | Grain-Inclusive Gut Health | Round kibble | Chicken | 12 lb | Amazon |
| Royal Canin Small Puppy | Breed-Specific Precision | Crunchy kibble | Chicken | 14 lb | Amazon |
In‑Depth Reviews
1. Now Fresh Grain-Free Small Breed Dry Puppy Food with Turkey, Salmon & Duck
A chicken-free, multi-protein recipe that treats a Shih Tzu’s sensitive digestion like a top priority.
This formula swaps out chicken — a common allergen for small breeds — and leads with turkey, salmon, and duck instead. The kibble is tiny, making it easy for a Shih Tzu puppy to pick up and chew without gulping air. Buyers report that their picky pups have “no diarrhea unlike RC puppy chow,” which points to how well the prebiotics and pumpkin support a steady stomach during the transition from the breeder’s food.
At only 3.5 pounds per bag, you will reorder more often than with a 15-pound sack, but that small size also means the kibble stays fresher. The grain-free, gluten-free recipe is a strong match if your pup shows signs of grain sensitivity. Unlike the bigger Blue Buffalo bag below, this one is a lighter investment upfront to test whether your puppy tolerates a chicken-free diet.
Why It Wins for Sensitive Pups
- Chicken-free recipe reduces allergy risk
- tiny kibble is easy for tiny mouths
- highly digestible multi-protein blend
The Trade-Off
- Small 3.5-lb bag means more frequent repurchases
Reach for this if: your Shih Tzu puppy has a sensitive stomach, and you want to avoid chicken as a first ingredient.
Look elsewhere if: you prefer a grain-inclusive recipe or want a larger bag to reduce order frequency.
2. ORIJEN Grain Free High Protein Dry Dog Food Small Breed Puppy Recipe
Biologically appropriate protein that fuels a growing Shih Tzu without upsetting its stomach.
ORIJEN uses a WholePrey approach — poultry, fish, and organs — to mirror the diet a puppy’s ancestors would have eaten in the wild. The kibble is square-shaped with a diameter of 6-7 mm and a width of 5-6 mm, which is one of the smallest kibble dimensions on this list. Owners mention “puppy loved it; small pebbles easy to chew,” and that the high-protein formula supports “improved energy and shinier coat” when started early.
The 4-pound bag is small, and the price per pound is higher than the Blue Buffalo bag below. But if you value a grain-free, high-protein recipe that includes EPA and DHA from salmon and whiting oil for brain development, this is a focused formula that skips fillers. One owner who switched from another brand said their “puppy spits the other food on the floor” — a strong sign that the taste wins with picky eaters.
What Stands Out
- Smallest kibble size (6-7 mm) on the list
- high protein from animal ingredients supports muscle growth
- includes DHA for brain development
The Catch
- Premium price per pound
- Small 4-lb bag needs frequent ordering
Best for: owners who want a high-protein, grain-free diet and don’t mind the premium cost.
skip it if: your budget requires a larger bag, or if your vet recommends a grain-inclusive recipe.
3. Blue Buffalo Life Protection Formula Small Breed Puppy Dry Dog Food
A giant bag at a mid-range price that covers months of growth for a small puppy.
Blue Buffalo leads with real chicken as the first ingredient and adds DHA (an omega-3 fatty acid) to support cognitive development during early puppyhood. The 15.16-pound bag is much larger than the 3.5-pound and 4-pound bags of Now Fresh and ORIJEN, making this the most economical choice per pound on the list. One buyer with a Morkie Shih Tzu mix reports their pup was “only suppose to get 6-7 pounds and he’s already 6.9 pounds at 4 months lol,” which suggests the food supports steady growth.
The formula includes antioxidant-rich LifeSource Bits for immune support, and it’s made without chicken by-product meals, corn, wheat, or soy. The kibble is a small-breed granule, though not as tiny as ORIJEN’s 6-7 mm square shape. Some owners note that their dogs eventually lose interest — one reviewer says “he still eats it” but only “when no other option” — so flavor fatigue can happen over time.
The Pros
- Best price per pound of the five picks
- real chicken as #1 ingredient with DHA for brain development
- large 15.16-lb bag reduces repurchase frequency
The Cons
- Kibble not as small as ORIJEN
- some pups may lose interest over time
Ideal for: budget-conscious owners who want a solid, well-known brand with a large supply.
Not for: extremely picky puppies who need a tiny kibble and novel protein sources.
4. NutriSource Small & Medium Breed Puppy Dry Dog Food
A grain-inclusive recipe that focuses on compact nutrition and a healthy gut for sensitive breeds.
NutriSource takes a different approach than the grain-free picks above: it includes grains like rice but packs the formula with prebiotics and probiotics to support a healthy gut. The round kibble is sized for small and medium breeds, and the 12-pound bag offers a solid middle ground between the tiny 3.5-lb bags and the enormous 15.16-lb Blue Buffalo bag. Customers note it’s “only 3 calories per piece,” which makes it easy to measure portion control for a tiny Shih Tzu puppy.
The formula includes balanced Omega-3 and Omega-6 fatty acids along with L-Carnitine and taurine for heart health — a consideration if your puppy is prone to cardiac issues later in life. One breeder recommended it for their pups, and owners note “zero digestive issues” when starting on it. The bag is 12 pounds versus 4 pounds for ORIJEN and 3.5 pounds for Now Fresh, and the value per pound is better than the premium grain-free brands.
Standout Features
- Grain-inclusive with prebiotics and probiotics
- only 3 calories per piece for easy portioning
- balanced Omegas + taurine for heart health
The Limitation
- Round kibble may not be as tiny as ORIJEN’s square shape
- chicken-based formula may not suit allergies
A strong pick for: owners who prefer a grain-inclusive diet with proven digestive support.
Consider another if: your Shih Tzu puppy needs a chicken-free or smaller kibble.
5. Royal Canin Size Health Nutrition Small Puppy Dry Dog Food
A precision formula designed for puppies with an expected adult weight of 9 to 22 pounds.
Royal Canin doesn’t rely on trendy grain-free marketing — it uses a crunchy kibble texture paired with prebiotics and antioxidants to support immune health and digestion during the rapid growth phase from 2 to 10 months. The bag is 14 pounds, giving you a long-lasting supply similar to Blue Buffalo but at a higher price point. The formula is designed for small breed puppies with an expected adult weight of 9 to 22 lbs, which fits a Shih Tzu’s typical adult size perfectly.
The kibble is crunchy and easy to serve, and the brand suggests mixing it with Royal Canin Small Puppy Thin Slices in Gravy for a textured meal. Reviewers point out that the food “works great” and that “puppy was raised on this from the breeder” — a sign that many puppies accept it without hesitation. The main downside is the price: it is the most expensive per-pound option on the list, and the ingredient list is less transparent about whole-protein sources compared to ORIJEN or Now Fresh.
What You Get
- Tailored for small breeds with a precise 9-22 lb adult weight target
- antioxidants and prebiotics for immune and digestive support
- 14-lb bag lasts a while for a single puppy
The Downside
- Highest price per pound on the list
- less visible whole-protein ingredients than competitors
Choose Royal Canin if: you trust the brand’s veterinary-tailored formulas and want a precise small-breed match.
Pass on it if: you prioritize whole-protein-first ingredients or need a more budget-friendly option.
Understanding the Specs
Kibble Size
Kibble size is the single most overlooked spec for a Shih Tzu puppy. A kibble that is too large can be difficult for a tiny mouth to pick up and chew, leading to gulping and potential choking. Look for kibble described as “tiny” or with a diameter under 8 mm — ORIJEN’s 6-7 mm square shape is a great benchmark. A smaller kibble also encourages slower eating, which helps with digestion.
Protein Source and Type
The first ingredient should always be a named protein: chicken, turkey, salmon, or duck. These provide the amino acids needed for muscle development and coat health. Chicken is the most common protein, but if your Shih Tzu puppy has a sensitive stomach or itchy skin, a chicken-free formula like Now Fresh (with turkey, salmon, and duck) can reduce the chance of a food sensitivity reaction.
Prebiotics and Probiotics
These support a healthy gut microbiome, which is especially important for Shih Tzu puppies who are prone to loose stools during transitions. Prebiotics (like chicory root or pumpkin) feed the good bacteria, while probiotics add beneficial bacteria directly. NutriSource and Now Fresh both include these, making them strong options for sensitive stomachs.
Bag Weight and Freshness
Larger bags (14-15 lbs) mean fewer reorders but longer exposure to air once opened. Smaller bags (3.5-4 lbs) keep the kibble fresher for longer and let you test a new formula without a large financial commitment. If your puppy is a slow eater or you only have one dog, a smaller bag like ORIJEN’s 4-lb option may be the practical choice.
FAQ
What size kibble does a Shih Tzu puppy need?
Can Shih Tzu puppies eat grain-free food?
How much should I feed my Shih Tzu puppy per day?
Is chicken bad for Shih Tzu puppies?
Should I choose a grain-inclusive or grain-free formula for my Shih Tzu puppy?
How long does a 15-lb bag of puppy food last for a Shih Tzu puppy?
What is DHA and why does my puppy need it?
Can I mix wet food with dry kibble for my Shih Tzu puppy?
How do I transition my Shih Tzu puppy to a new food?
Final Thoughts: The Verdict
For most owners, the best dog food for shih tzu puppy is the Now Fresh Grain-Free Small Breed Puppy formula because its chicken-free, multi-protein recipe and tiny kibble specifically address the two biggest challenges: food sensitivities and small-mouth chewing. If you want a high-protein, grain-free option with the smallest kibble on the market, grab the ORIJEN Small Breed Puppy Recipe. And for the most budget-friendly large bag that still nails the nutritional basics, the standout is the Blue Buffalo Small Breed Puppy Chicken & Oatmeal Recipe.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.