How much should I feed an adult Westie?

A healthy adult Westie (about 15–20 lb) typically needs roughly 420–660 calories a day — about 1¼ to 2 cups of dry food, split into two meals. The exact cups depend on your food's kcal per cup (check the bag); see the adult row matching your dog's weight.

How many times a day should a Westie eat?

Per AKC, adult dogs do well on two meals a day; puppies need 3–4 small meals. Scheduled meals beat free-feeding for a small dog that tends to drift slightly overweight — it's easier to manage portions you actually measured.

How much should I feed a Westie puppy?

A Westie puppy under 4 months is typically fed about 3× its resting energy needs across 4 small meals a day; from 4 months it steps down to roughly 2× across 3 meals. Find your puppy's current weight in the puppy rows of the chart above for an estimated daily amount.

Why does my Westie need a special diet?

Some don't — but VCA notes some Westies need a special diet for allergies or liver problems, so if yours is itching, has chronic skin or ear flare-ups, or has a flagged liver value at the vet, the food may be part of the plan rather than just maintenance. Your vet is the right source for whether a prescription or limited-ingredient diet is appropriate; this page is for healthy-dog portion math.

When should a Westie switch from puppy to adult food?

Small breeds like the Westie can transition by around 12 months. Confirm timing with your vet based on your dog's growth and body condition.

How do I know if my Westie is overweight?

The bright white double coat hides almost everything visually — go by feel. You should be able to feel the ribs easily without pressing through fat, and find a clear waist tuck behind the ribcage. If you can't, cut portions back and confirm a target weight with your vet.

When will my Westie stop growing?

Per AKC's Puppy Growth Chart, small breeds like the Westie reach about 90% of their adult size by 9 months and full adult size by about 12 months. Westies typically finish growing earlier than larger breeds — most are at adult height and weight by their first birthday.

What is the average adult weight of a Westie?

AKC's West Highland White Terrier Breed Standard sets adult weight at 15-20 pounds.

Westie Feeding Chart: How Much to Feed by Age & Weight

A healthy adult Westie (15–20 lb) needs roughly 420–660 calories a day — about 1¼ to 2 cups of typical dry food, split into two meals. VCA notes Westies tend to stay at a good weight or slightly overweight, and some need a special diet for allergies or liver problems — so measure portions, and check with your vet before any prescription-style switch. The bright white double coat hides waist thickening; go by feel, not by eye.

Westie puppies need more per pound than adults, fed across 3–4 small meals, and as a small breed typically transition to adult food around 12 months. The chart below gives sourced starting points by weight; the calculator tailors them to your dog.

Healthy adult Westie (West Highland White Terrier) with pure white double coat standing alert beside a food bowl

Last updated 2026-06-03 · Every number links to its source.

💪 Westie Adult Size & Growth

Westie adult size and growth chart — male and female weight and shoulder-height ranges plus when this breed is fully grown

See raw data

Sex	Weight	Shoulder height
Male	15-20 pounds	11 inches
Female	15-20 pounds	10 inches

Fully grown by 12 months (Small breeds typically reach adult height first, then fill out in chest and muscle).

Per AKC's Puppy Growth Chart, Small breeds reach about 75% of their adult weight by 6 months, 90% by 9 months, 100% by 12 months, 100% by 15 months, and 100% by 18 months.

How much should my Westie eat? ↓Can my Westie eat this food? →

Source: AKC Westie official breed standard; AKC When Do Dogs Stop Growing? — every number verified verbatim.

Daily Feeding Amounts by Weight & Age

Find your dog's current weight in the chart for an estimated daily amount. Calories come from the Merck Vet Manual energy formula; cups assume a typical ~350 kcal/cup dry food, so check your bag's label for its exact kcal/cup.

Westie feeding chart — daily food by weight and age

⬇ Save chart as image

See the exact numbers as a table

Puppy (under 4 months) — 4 meals/day

RER × 3.0 (Merck, high-growth window)

Weight	Daily calories	~ Cups/day	~ Grams/day
2 lb	195 kcal	0.6	56 g
4 lb	328 kcal	0.9	94 g
7 lb	500 kcal	1.4	143 g
9 lb	603 kcal	1.7	172 g

Puppy (4 months to 12 months) — 3 meals/day

RER × 2.0 (Merck)

Weight	Daily calories	~ Cups/day	~ Grams/day
2 lb	130 kcal	0.4	37 g
4 lb	219 kcal	0.6	63 g
7 lb	333 kcal	1	95 g
9 lb	402 kcal	1.1	115 g

Adult — 2 meals/day

RER × 1.6 neutered (Merck; intact a little more, obesity-prone a little less)

Weight	Daily calories	~ Cups/day	~ Grams/day
15 lb	472 kcal	1.3	135 g
17 lb	518 kcal	1.5	148 g
18 lb	541 kcal	1.5	155 g
20 lb	585 kcal	1.7	167 g

These are healthy-dog starting points, not a strict rule — body condition and activity vary. Confirm your dog's target with your veterinarian. For your exact dog, use the calculator below.

Is my puppy a healthy weight for its age?

Rather than one “correct” weight, vets track puppies against evidence-based growth standards that run from 12 weeks to 2 years.

Those standards are grouped by a dog's adult body size (up to 40 kg), not by individual breed.

We don't publish a per-age “your puppy should weigh X” figure — that belongs on a vet's growth chart, weighed over time. What we give you instead is the daily caloriesfor your dog's actual weight today (the chart above and the calculator below), every number cited.

Adjust this plan for your own dog

The plan below is for a typical Westie. Change the details to match yours.

Breed

Age

Young puppies are usually counted in weeks. We use your dog's exact age — feeding frequency and calories follow different age guidelines, so we apply each separately.

Weight (lb)

What are you trying to figure out today?

This plan is general guidance for a healthy dog. If your dog has a health condition — or is a senior whose needs are changing with age — your veterinarian should be the final word.

The plan for a typical Westie

🐕 Here's the plan for your Westie

Healthy puppy (4 months+) · 4 months old · 10 lb

435 cal/day · ~1.2 cups · 3 meals/day

🍽 HOW MUCH YOUR WESTIE PUPPY SHOULD EAT

Your little one is growing fast — and that takes fuel. About 435 calories a day will keep your westie on a healthy track.

Here's what that looks like in your kitchen:

📏 ~ 124 grams on a kitchen scale

🥤 ~ 1.2 standard measuring cups (the 1-cup kind)

☕ ~ 0.6 large coffee mug worth

Split into 3 meals a day:

≈ 145 calories per meal (~41 g / ~0.4 cup)

Why 3 meals?

Puppies have small stomachs and growing bodies that want food often. As your dog grows, you'll feed less often:

• 6 to 12 weeks: 4 meals a day
• 3 to 6 months: 3 meals a day ← your puppy now
• 6 to 12 months: 2 meals a day
• After age 1: 2 meals a day

Just look up your puppy's age in months and pick the row that matches.

📦 One quick thing:every brand has slightly different calories per cup. Your bag's label tells you exactly — look for “kcal per cup” and divide 435 by that number for your real cup count.

Specific to Westie

•Per VCA's breed profile, Westies tend to stay at a good weight or slightly overweight, and some may need a special diet for allergies or liver problems. Measuring portions to a calorie target — rather than free-feeding — is the standard lever; any prescription-style food change belongs with your vet.

💧 Water~10 oz/day▼

A good rule of thumb: a weaned puppy needs about ½ to 1 ounce of water per pound of body weight each day. The numbers below use the higher end as a safe target — most dogs settle in somewhere in this range.

For your 10-pound westie, that's:

💧 ~ 10 oz / ~ 296 ml a day

🥤 ≈ 1.3 measuring cups

🍶 ≈ 0.6 standard 16-oz water bottles (Aquafina / Poland Spring size)

Keep the bowl filled with fresh water.

🍬 Treatsup to 44 cal/day▼

Treats are great for training and bonding — but they should be the bonus, not the main course.

The 90/10 rule keeps things balanced:

• 90% of daily calories from real dog food
• 10% from treats, chews, table scraps — anything extra

For your 10-pound westie at 435 calories/day, that means up to 44 calories from treats.

💡 Don't forget the small stuff. That bite of cheese you sneak them, the piece of chicken from dinner, the dental chew before bed — it all counts toward the 10%. Adds up faster than most of us expect.

🛒 How to choose dog food▼

Walking into the pet store can be overwhelming. But you only need to check the back or side of the dog food bag for these things:

☐ The bag has an AAFCO Nutritional Adequacy Statement that mentions “growth”
Look for a full sentence on the back or side of the bag containing both “AAFCO” and “growth”. Typical wording is one of two formats:
- “[Brand] is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for growth.”
- “Animal feeding tests using AAFCO procedures substantiate that [Brand] provides complete and balanced nutrition for growth.”
☐ “Calories per cup” is printed on the bag
Usually in the feeding guide section. You need this number to know exactly how much to scoop for your dog.

🚫 FOODS TO KEEP AWAY FROM YOUR WESTIE

Some everyday human foods are dangerous — even tiny amounts can cause serious harm. Keep these well out of reach:

Never feed: chocolate, xylitol (sugar-free gum / candy / some peanut butters), grapes, raisins, onions, garlic, macadamia nuts, alcohol, caffeine, avocado.

⚠️ Xylitolis a sweetener that's safe for humans but can be deadly to dogs. If your dog ingests anything containing xylitol, call your vet right away.

A few feeding habits to skip:

Free-feeding (leaving food out all day). It sounds convenient but makes portion control and weight monitoring much harder.
Switching food suddenly. Transition over 7-10 days — mix the new food with the old in growing proportions to avoid an upset stomach.
Switching to adult food too early. Puppy formulas are higher in protein than adult formulas — tuned for the demands of growth. When to actually switch? Small breeds (under 20 lb) at 8-12 months; medium breeds (20-50 lb) around 12 months; large breeds (50+ lb) at 12-15 months; giant breeds at 18-24 months.

📚 WHERE WE GOT ALL THIS

Every number and recommendation above comes from one of these sources. Tap any (▼) citation throughout the page to see the original wording. Full source documents are linked below.

MERCK — Merck Veterinary Manual ↗The Merck Veterinary Manual (published as MSD Veterinary Manual outside the U.S. and Canada) is a free, comprehensive veterinary reference used by veterinarians, students, and pet owners worldwide. Its nutrition chapters are authored by named board-certified veterinary nutritionists.
AAFCO — Association of American Feed Control Officials ↗AAFCO is a non-profit organization of U.S. state and federal feed-control officials that develops model regulations and nutrient profiles for pet food. Every dog food sold in the U.S. must meet AAFCO's standards to be marketed as 'complete and balanced'.
AKC — American Kennel Club ↗The AKC is the largest U.S. registry of purebred dogs and a widely-cited authority on general dog care, breed information, and owner education. Its Chief Veterinary Officer and expert advice column publish nutrition guidance for everyday dog owners.
FDA — U.S. Food and Drug Administration ↗The FDA is the U.S. federal agency that regulates food and drug safety, including pet food. Its Center for Veterinary Medicine publishes safety alerts about ingredients and household items toxic to pets.
PMC — PubMed Central (NIH) ↗PubMed Central is a free archive of peer-reviewed biomedical and life-sciences research curated by the U.S. National Library of Medicine (NIH). Papers cited here are open-access primary sources.

Last verified: 2026-05-23

❤️ A friendly reminder: this is general guidance, not a custom plan for your dog.

The plan above reflects what the Merck Veterinary Manual, AAFCO, AKC, and the FDA publish for dogs matching your Westie's breed, age, weight, and life stage. But every dog is different — habits, digestion, and individual quirks aren't in our data.

If something seems off, or you just want a second opinion, your vet is the right call. We've put together some talking points below to make that conversation easier ↓

🩺 QUESTIONS TO BRING TO YOUR VET

Save or print this list and bring it to your next visit.

❓ “What body condition score is my Westie at now, and what's the ideal?”
Why ask: The 1-9 body condition score is the standard vets use to tell if your dog is at a healthy weight.
❓ “When should we transition from puppy to adult food?”
Why ask: Most small/medium breeds transition at 9-12 months — your vet can confirm based on your dog's growth.
❓ “Are there breed-specific screenings or watches for Westies at this age?”
Why ask: Westies have known breed traits worth monitoring — your vet may suggest preventive screening based on age and lineage.

Westie feeding — common questions

How much should I feed an adult Westie?: A healthy adult Westie (about 15–20 lb) typically needs roughly 420–660 calories a day — about 1¼ to 2 cups of dry food, split into two meals. The exact cups depend on your food's kcal per cup (check the bag); see the adult row matching your dog's weight.
How many times a day should a Westie eat?: Per AKC, adult dogs do well on two meals a day; puppies need 3–4 small meals. Scheduled meals beat free-feeding for a small dog that tends to drift slightly overweight — it's easier to manage portions you actually measured.
How much should I feed a Westie puppy?: A Westie puppy under 4 months is typically fed about 3× its resting energy needs across 4 small meals a day; from 4 months it steps down to roughly 2× across 3 meals. Find your puppy's current weight in the puppy rows of the chart above for an estimated daily amount.
Why does my Westie need a special diet?: Some don't — but VCA notes some Westies need a special diet for allergies or liver problems, so if yours is itching, has chronic skin or ear flare-ups, or has a flagged liver value at the vet, the food may be part of the plan rather than just maintenance. Your vet is the right source for whether a prescription or limited-ingredient diet is appropriate; this page is for healthy-dog portion math.
When should a Westie switch from puppy to adult food?: Small breeds like the Westie can transition by around 12 months. Confirm timing with your vet based on your dog's growth and body condition.
How do I know if my Westie is overweight?: The bright white double coat hides almost everything visually — go by feel. You should be able to feel the ribs easily without pressing through fat, and find a clear waist tuck behind the ribcage. If you can't, cut portions back and confirm a target weight with your vet.
When will my Westie stop growing?: Per AKC's Puppy Growth Chart, small breeds like the Westie reach about 90% of their adult size by 9 months and full adult size by about 12 months. Westies typically finish growing earlier than larger breeds — most are at adult height and weight by their first birthday.
What is the average adult weight of a Westie?: AKC's West Highland White Terrier Breed Standard sets adult weight at 15-20 pounds.

Helpful guides

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General dog food calculator (any dog) →