Learn how to safely increase your cat’s caloric intake with simple, nutritious additions like cooked meats, healthy oils, and vet-recommended supplements. This guide covers easy methods, portion tips, and warning signs to help underweight or high-energy cats thrive.
Key Takeaways
- Consult your vet first: Always check with a veterinarian before changing your cat’s diet, especially if they’re underweight or have health issues.
- Use high-calorie, cat-safe ingredients: Focus on lean meats, fish, and healthy fats like salmon oil—avoid human junk food.
- Gradual transitions prevent digestive upset: Introduce calorie boosters slowly over 7–10 days to avoid vomiting or diarrhea.
- Monitor weight and behavior: Track your cat’s weight weekly and watch for signs of improvement or adverse reactions.
- Commercial high-calorie supplements exist: Products like Tomlyn Nutri-Cal or Royal Canin Recovery Formula offer safe, balanced calorie boosts.
- Hydration is key: Extra calories can increase thirst—always provide fresh water and consider wet food for moisture.
- Not all cats need more calories: Active or recovering cats benefit most; overweight cats should avoid extra calories without vet guidance.
How to Add More Calories to Cat Food: A Complete Guide
If your cat is underweight, recovering from illness, or simply needs more energy, you might be wondering how to add more calories to their food. Cats have unique nutritional needs—they’re obligate carnivores, meaning they thrive on animal-based proteins and fats. Unlike dogs or humans, they can’t efficiently process plant-based calories. So, simply adding rice or vegetables won’t cut it.
This guide will walk you through safe, effective, and vet-approved methods to boost your cat’s caloric intake. Whether you’re dealing with a picky eater, a senior cat losing weight, or a kitten who’s burning through energy, these steps will help you nourish your feline friend without compromising their health.
We’ll cover everything from choosing the right high-calorie ingredients to avoiding common mistakes. By the end, you’ll know exactly how to add more calories to cat food—safely and sustainably.
Why Your Cat Might Need More Calories
Visual guide about How to Add More Calories to Cat Food
Image source: justchartit.com
Before diving into solutions, it’s important to understand why your cat might need extra calories. Not all cats require a calorie boost, and adding too many without a reason can lead to obesity. Here are common scenarios where increasing caloric intake makes sense:
- Underweight cats: If your cat feels bony or has visible ribs, they may need more energy to gain healthy weight.
- Senior cats: Older cats often eat less due to reduced appetite or dental issues, leading to weight loss.
- Kittens: Growing kittens need extra calories for development—up to three times more per pound than adult cats.
- Recovery from illness or surgery: Cats healing from infections, injuries, or operations need more nutrients to rebuild tissue.
- High-energy breeds: Active cats like Bengals or Abyssinians may burn calories faster and need more fuel.
- Stress or environmental changes: Moving, new pets, or loud noises can suppress appetite, leading to calorie deficits.
If you’re unsure whether your cat needs more calories, consult your vet. They can assess your cat’s body condition score (BCS) and recommend a target weight. A BCS of 3–4 out of 9 is ideal—ribs should be felt but not seen.
Step 1: Choose the Right Base Food
The foundation of any calorie-boosting plan is a high-quality base food. Start with a nutrient-dense cat food that’s already rich in animal protein and fat. Look for labels that list meat (like chicken, turkey, or fish) as the first ingredient—not grains or fillers.
Wet vs. Dry Food
Wet food is often better for calorie boosting because it’s more palatable and hydrating. Many cats prefer the smell and texture, which encourages eating. Plus, wet food typically has higher protein and fat content than dry kibble.
However, dry food can be useful for slow calorie increases—especially if your cat grazes throughout the day. Some high-calorie dry foods are specifically formulated for weight gain, like Hill’s Science Diet Perfect Weight or Purina Pro Plan True Calm.
Look for High-Calorie Formulas
Some commercial cat foods are designed to deliver more calories per serving. These are ideal for underweight or high-need cats. Examples include:
- Royal Canin Recovery Formula: High in calories and protein, often used post-surgery.
- Hill’s a/d Urgent Care: Soft, easy-to-eat food with added fats and nutrients.
- Blue Buffalo Wilderness High Protein: Grain-free with real meat and healthy fats.
Always check the calorie count on the label. Most adult cat foods provide 300–500 kcal per cup. High-calorie options can offer 600+ kcal per cup.
Step 2: Add Cooked, Lean Meats
One of the easiest and most effective ways to add calories is by mixing in cooked, unseasoned meats. Cats love the taste, and these additions are packed with protein and fat—exactly what they need.
Safe Meat Options
Stick to plain, cooked meats without oils, spices, or seasonings. Onions, garlic, and salt are toxic to cats. Here are safe choices:
- Chicken (boneless, skinless): Boil or bake without seasoning. Shred into small pieces.
- Turkey: Ground or sliced, cooked thoroughly.
- Beef (lean cuts): Cook well-done and chop finely.
- Lamb: A rich source of fat and protein—great for calorie boosting.
- Fish (salmon, tuna, sardines): Cooked and deboned. Avoid raw fish due to bacteria and enzyme risks.
How Much to Add
Start with 1–2 tablespoons of meat per meal. Mix it into your cat’s regular food. Gradually increase if your cat tolerates it well. For example:
- Day 1–3: 1 tablespoon per meal
- Day 4–7: 1.5 tablespoons
- Day 8+: 2 tablespoons (if no digestive issues)
Avoid feeding large portions at once—this can cause stomach upset.
Preparation Tips
- Cook meat thoroughly to kill bacteria.
- Remove all bones, skin, and fat trimmings (excess fat can cause pancreatitis).
- Store leftovers in the fridge for up to 3 days or freeze for longer storage.
- Warm the meat slightly before serving—cats prefer food at body temperature.
Step 3: Incorporate Healthy Fats and Oils
Fats are the most calorie-dense nutrient—providing over twice the energy of protein or carbs. Adding healthy fats is a smart way to boost calories without increasing volume.
Best Oils for Cats
- Salmon oil: Rich in omega-3 fatty acids, supports skin, coat, and joint health. Add 1/4 to 1/2 teaspoon per meal.
- Coconut oil: Contains medium-chain triglycerides (MCTs) that are easily digested. Start with 1/8 teaspoon and increase slowly.
- Cod liver oil: High in vitamins A and D—use sparingly (1/4 teaspoon max) to avoid toxicity.
How to Use Oils
Mix the oil directly into your cat’s wet food or sprinkle over dry kibble. Stir well to ensure even distribution. Some cats may dislike the taste at first—try warming the food slightly to enhance aroma.
Precautions
- Never use vegetable oils like canola or soybean—they lack essential fatty acids for cats.
- Avoid butter or margarine—high in lactose and unhealthy fats.
- Watch for diarrhea or greasy stools—reduce amount if this occurs.
Step 4: Use High-Calorie Supplements
Commercial calorie supplements are formulated specifically for cats and offer a balanced, convenient boost. These are especially helpful for cats who won’t eat extra food or need rapid weight gain.
Popular Supplements
- Tomlyn Nutri-Cal: A high-calorie gel with vitamins, minerals, and fish oil. Cats often love the taste. Apply 1/2 to 1 inch per day, directly into the mouth or on paw for licking.
- Vetoquinol Nutri-Cal: Similar to Tomlyn, with added taurine—an essential amino acid for cats.
- Fortiflora by Purina: A probiotic powder that supports digestion and can improve nutrient absorption, indirectly helping with weight gain.
How to Administer
- Apply the gel to your cat’s paw or mouth—they’ll lick it off.
- Mix powder supplements into wet food.
- Follow package instructions—overuse can cause diarrhea or nutrient imbalances.
These supplements are safe for short-term use but should not replace balanced meals long-term.
Step 5: Try Bone Broth (Cat-Safe Version)
Bone broth is hydrating and rich in minerals, but it must be made safely for cats. Store-bought broths often contain onions, garlic, or salt—all toxic.
How to Make Cat-Safe Bone Broth
- Use only chicken or turkey bones (no beef or pork).
- Simmer bones in water for 12–24 hours with a splash of apple cider vinegar (to extract minerals).
- Strain thoroughly to remove all bone fragments.
- Cool and serve plain—no salt, herbs, or spices.
Serving Suggestions
- Offer 1–2 tablespoons as a topper over food.
- Freeze in ice cube trays for easy portioning.
- Warm slightly before serving—cats prefer warm liquids.
Bone broth adds moisture and flavor, encouraging eating in picky or dehydrated cats.
Step 6: Increase Meal Frequency
Sometimes, the simplest solution is to feed more often. Instead of two large meals, try three to four smaller ones throughout the day. This can help cats with small stomachs or low appetites consume more calories over time.
Sample Feeding Schedule
- Morning: Wet food + 1 tbsp cooked chicken
- Afternoon: Dry kibble + salmon oil
- Evening: Wet food + bone broth
- Before bed: Small snack (e.g., Nutri-Cal gel)
Use an automatic feeder for consistency, especially if you’re away during the day.
Step 7: Monitor Progress and Adjust
Adding calories isn’t a one-size-fits-all process. You’ll need to track your cat’s weight, appetite, and behavior to ensure the plan is working.
How to Track Weight
- Weigh your cat weekly using a pet scale or bathroom scale (weigh yourself, then weigh yourself holding the cat—subtract the difference).
- Look for steady gains—0.5 to 1 pound per month is healthy for most cats.
- Use a body condition chart to assess fat cover over ribs and spine.
Signs of Success
- Increased energy and playfulness
- Softer, shinier coat
- Steady or rising weight
- Improved muscle tone
When to Adjust
- If your cat gains too quickly (more than 1 lb/week), reduce added calories.
- If no weight gain after 3–4 weeks, consult your vet—there may be an underlying issue.
- If vomiting, diarrhea, or lethargy occurs, stop new additions and call your vet.
Troubleshooting Common Issues
Even with the best plan, you might run into challenges. Here’s how to handle them:
Cat Won’t Eat the New Food
- Warm the food to enhance smell.
- Mix new ingredients gradually—start with 10% new, 90% old.
- Try different textures (pâté, shreds, gravy).
- Hand-feed small amounts to build trust.
Digestive Upset
- Slow down the transition—extend the 7–10 day adjustment period.
- Reduce portion sizes of added fats or meats.
- Add a probiotic like Fortiflora to support gut health.
Weight Gain Too Slow
- Increase calorie density—add more oil or supplement.
- Rule out medical issues (e.g., parasites, hyperthyroidism) with a vet.
- Ensure your cat isn’t sharing food with other pets.
Foods to Avoid
Not all calorie-rich foods are safe for cats. Avoid these:
- Dairy products: Most cats are lactose intolerant—milk, cheese, and cream can cause diarrhea.
- Raw eggs: Contain avidin, which blocks biotin absorption.
- Chocolate, caffeine, alcohol: Highly toxic.
- Onions, garlic, chives: Destroy red blood cells.
- Grapes and raisins: Can cause kidney failure.
- Bones (cooked): Can splinter and cause choking or internal injury.
When in doubt, ask your vet.
Conclusion
Adding more calories to your cat’s food doesn’t have to be complicated. With the right ingredients—like cooked meats, healthy oils, and vet-approved supplements—you can safely boost your cat’s energy and help them reach a healthy weight.
Remember to start slow, monitor progress, and always consult your veterinarian before making major dietary changes. Every cat is unique, and what works for one may not work for another.
By following this guide, you’re not just increasing calories—you’re supporting your cat’s overall health, vitality, and happiness. With patience and care, your feline friend will be thriving in no time.