It's probably one of the most common things I hear from pet parents coming into the store: "My vet said my pet needs to lose weight." It comes up constantly. And it makes sense — weight issues in pets are widespread, and the causes are often hiding in plain sight. The good news is that once you understand what's actually happening, the path forward becomes a lot clearer.
How do you know your dog has a weight problem?
There's a pretty reliable visual cue that tells you things have gotten serious: the box shape. When a dog starts losing their waist definition and their body from above looks more like a rectangle than an hourglass, that's a sign. A healthy dog should have a visible waist tuck when viewed from above, and you should be able to feel (but not see) their ribs without pressing hard.
Once a dog reaches that box shape stage, you're typically looking at more than just cosmetic concerns. Decreased energy, a smellier coat, and health markers that can be alarming. If your vet runs a CBC — a complete blood count — at this stage, the results are often a real wake-up call.
If you're noticing rapid or unexplained weight gain or loss combined with coat changes — thinning, separating, becoming coarse or wire-like — ask your vet to run a T4 thyroid test, not just a CBC. A thyroid issue changes the approach entirely and is often missed without that specific test.
The first questions to ask yourself
Before looking at solutions, you need an honest picture of what's actually going into your dog every day. Three questions to start with:
- What are you feeding — dry, wet, freeze-dried, gently cooked, raw, homemade?
- How much and how often?
- How much exercise is your dog actually getting?
Most of the time when I ask these questions, the issue reveals itself pretty quickly. And it almost always starts with dry food.
The dry food calorie problem — and the canned food myth
The majority of overweight dogs I see are on a dry-only diet. And there's a persistent myth I run into constantly: the idea that canned food makes pets fat. Flip a can over and look at the guaranteed analysis. The moisture content is typically 78–80%. That's water. And water has zero calories.
🥜 Typical Dry Food
🥫 Typical Wet / Canned Food
Are you actually reading the feeding guidelines?
I always ask: "How much are you feeding your dog?" A common answer is something like, "A cup in the morning and a cup at night." Fine — but then I ask what the dog weighs. "About ten pounds." And then it gets quiet.
Here's the thing about feeding guidelines: they vary significantly between brands — not just by dog size, but by how nutrient-dense the food is. Two real examples from brands we carry:
| Brand | Dog Weight | Daily Amount | Approx. kcal/cup |
|---|---|---|---|
| NutriSource Grain Free Chicken | 20–30 lbs | ~1 cup/day | ~390 kcal |
| FirstMate Grain Free | 20–30 lbs | ~½–¾ cup/day | ~505 kcal |
FirstMate is more nutrient-dense with less filler — which means the kibble packs more into every cup. A 30-pound dog on FirstMate may only need about ¾ of a cup per day total. If you're feeding that dog one cup per meal because "that's what it says on another bag," you're significantly overfeeding.
What kind of cup are you using? I've had more than a few people tell me they use a red Solo cup. A party cup. Those hold 16–18 oz, not 8. That "one cup" of food could easily be double what it sounds like. Use a standard 8 oz measuring cup — it sounds obvious, but it makes a real difference.
Moisture and carbs — the two levers most people ignore
If your dog is on a dry-only diet, there are two things working against weight loss at the same time: a lack of moisture and a high carbohydrate load. Both matter.
You don't have to go all-in on raw to see results. Even shifting part of the diet away from dry and toward lower-carb, higher-moisture options makes a real difference. Think of it as dialing down two problems at once.
If you have an overweight cat on a dry-only diet, reducing carbs is one of the most impactful changes you can make. Cats have virtually no dietary need for carbohydrates — their bodies simply aren't designed to process them efficiently. A high-carb dry diet is one of the leading contributors to feline obesity and diabetes. Getting moisture and protein in, and carbs out, is the single most effective dietary shift for an overweight cat.
What about adding vegetables?
Great option — with one caveat. Leafy greens and zucchini are excellent low-calorie add-ins that give your dog something extra to eat without blowing the calorie budget. But be careful with high-sugar vegetables like carrots. Yes, carrots. A lot of dog owners love giving carrots as treats, and they're not harmful — but they're higher in natural sugars than people realize, and if you're dealing with a weight issue, loading up on carrots as a "healthy" treat can quietly work against you.
Whatever vegetables you add, blend or pulverize them first. Dogs don't have the digestive enzymes to break down raw plant cell walls efficiently — blending unlocks the nutrients and makes it much easier for their system to absorb. It also means you can add more volume with fewer calories.
Don't forget about meals vs. free feeding
If you're free feeding — leaving food out all day — and trying to manage your dog's weight at the same time, you're working against yourself. Scheduled meals allow the body to properly digest and process food, regulate hunger hormones, and actually work through what it's been given before the next serving arrives. It also gives you a clear picture of how much your dog is eating each day, which is essential when you're trying to make adjustments.
Exercise matters too
Diet is the biggest lever, but movement is the other half of the equation. Regular walks, play sessions, and activity appropriate for your dog's age and breed all contribute — and as the weight starts to come off with dietary changes, you'll likely notice your dog becoming more eager to move again too. It tends to build on itself.
Weight management in dogs isn't complicated, but it does require paying attention. The right amount of the right food, measured properly, with moisture in the diet, carbs kept in check, scheduled meals, appropriate treats, and regular movement. Start there — and if things aren't moving, come in and let's talk through it together.
Concerned about your pet's weight? Stop in — we can take a look at what you're feeding and help you build a simple plan that actually works. Find us in Freedom or Santa Cruz Westside.