As a veterinary nutritionist, one of the most common questions I get about small fluffy breeds is some version of “am I feeding too much or too little?” The Japanese Spitz makes this harder than most, because that gorgeous white double coat hides the body underneath. I have examined Spitz that looked perfectly trim through the fur, only to find a soft, padded body once I got my real-world the ribs. Feeding this breed well is less about a magic number and more about measuring, tracking, and adjusting.
In this guide I will give you a practical feeding chart by age, show you the simple math to size a portion to your individual dog, and explain how to read body condition through all that coat. Treat every number here as a starting point. Two dogs of the same weight can need noticeably different amounts depending on metabolism, neuter status, and how much they run around. Your job is to start in the right range and then let your dog’s waistline fine-tune it.
What You Will Need
Before you settle into a feeding routine, gather a few basics. Getting these right removes most of the guesswork that leads to over or underfeeding.
- A proper measuring cup (an 8 oz dry measuring cup), not a coffee mug or random scoop
- A kitchen or baby scale for the most accurate portions, especially for puppies
- A complete and balanced food that meets AAFCO nutrient profiles for your dog’s life stage
- The calorie content of your food (kcal per cup), printed on the bag or available from the maker
- Your dog’s current weight (weigh at home by holding your dog on a scale, or at the vet)
- A small notebook or phone note to log weight every two weeks
- A set feeding schedule so meals happen at the same times each day
The single most useful number is the kcal per cup of your specific food. Two foods can both fill a cup yet differ by 100 or more calories per serving, which over a small dog’s day is a meaningful gap.
Step by Step: How to Feed a Japanese Spitz the Right Amount
Here is the method I walk owners through in the clinic. It works for any small breed, not just the Spitz.
Weigh your dog accurately
Adult Japanese Spitz typically weigh 11 to 25 pounds. Get a current weight rather than guessing, because portions scale directly to body weight. Puppies should be weighed every couple of weeks as they grow fast.
Start with the bag’s feeding chart
Find your dog’s weight (and age, for puppy formulas) on the manufacturer’s chart. This gives you a sensible daily total in cups. The chart is a starting estimate, not a final answer.
Split the daily total into meals
Divide the day’s food across the correct number of meals for your dog’s age (see the chart below). Never give the whole day’s food in one sitting.
Subtract treats from the total
Treats and training rewards should stay under about 10 percent of daily calories. If you train a lot, reduce the kibble portion to compensate, or you will slowly overfeed.
Check body condition every two weeks and adjust
Feel the ribs and check for a waist. If your dog is gaining, trim the portion by roughly 10 percent. If ribs are too prominent, add a little. Re-check in two weeks and repeat.
A simple sanity check for adult maintenance: a rough daily calorie need is about 30 times body weight in kilograms, plus 70, then adjusted for activity. For a typical 7 kg (15 lb) adult Spitz that lands somewhere around 350 to 450 kcal a day for a moderately active, neutered dog. Match that to your food’s kcal per cup to get cups. Your vet can give you a more precise target for your individual dog.
Feeding Chart by Age (Starting Estimates)
| Age / Stage | Meals per day | Typical daily amount |
|---|---|---|
| 8 to 12 weeks | 4 | About 1 to 1.25 cups puppy food |
| 3 to 6 months | 3 | About 1.25 to 1.5 cups puppy food |
| 6 to 12 months | 2 to 3 | About 1 to 1.5 cups, tapering as growth slows |
| Adult (1 to 7 years) | 2 | About 0.75 to 1.5 cups adult food |
| Senior (7+ years) | 2 | Often slightly less; adjust to activity |
These ranges assume a standard small-breed kibble of roughly 350 to 400 kcal per cup. A more calorie-dense food means fewer cups. Always cross-check against your own bag and your dog’s body condition.
Common Mistakes to Avoid
Most overweight Spitz I see are not the result of obvious overfeeding. They are the product of small, repeated habits. Eyeballing portions instead of measuring, topping up the bowl when a dog “looks hungry,” handing out table scraps, and forgetting that treats are calories all add up fast on a small frame. A single ounce of cheese can be a large slice of a 15-pound dog’s daily allowance. Because the double coat hides the body, owners often do not notice the gain until it is significant.
Another frequent error is feeding adult portions to a still-growing puppy, or staying on calorie-dense puppy food long after growth has finished. Puppy formulas are richer for a reason, and an adult dog eating them at adult activity levels will tend to gain. Switch to an adult formula once growth slows, usually around 10 to 12 months.
Tips for Success
Measure every meal with the same cup and feed at set times so you can spot appetite changes early. Weigh your dog every two weeks and write it down, since trends matter more than any single number. Run your hands along the rib cage weekly, because with this coat your fingers are far more honest than your eyes. Keep treats under 10 percent of daily calories and subtract them from meals. When you change foods, transition over 7 to 10 days to protect the gut.
If your Spitz is a fussy eater, resist the urge to constantly upgrade to richer toppers, which only teaches your dog to hold out for better. Offer the measured meal, pick it up after 15 to 20 minutes if untouched, and try again at the next meal. A healthy dog will not starve itself, and a consistent routine usually settles picky behavior within a few days.
When to Get Professional Help
Most feeding questions can be handled at home, but some situations call for your veterinarian. Book a visit if your Japanese Spitz is losing or gaining weight despite a steady, measured diet, since this can signal a thyroid or other medical issue rather than a simple feeding problem. Sudden loss of appetite, repeated vomiting, diarrhea, or refusing food for more than a day in an adult (much sooner in a puppy) all warrant a prompt call.
Puppies are especially fragile. A very young toy or small-breed puppy that becomes weak, wobbly, or unresponsive may be experiencing low blood sugar, which is an emergency. Offer a small amount of food and contact your vet right away. For any specific calorie target, weight-loss plan, or special diet for a health condition, your veterinarian or a board-certified veterinary nutritionist can tailor a plan to your individual dog far better than any general chart. If you suspect your dog has eaten something toxic, contact your vet or the ASPCA Animal Poison Control Center at 888-426-4435.
Safety note: Any complete diet must meet AAFCO nutrient profiles for your dog’s life stage, and any sudden change in appetite or weight should be checked by your veterinarian rather than managed by adjusting portions alone.