Ready Cal High-Calorie Kitten Supplement Gel
Verified Jun 14, 2026
This is a high-calorie gel supplement designed to give kittens extra energy and nutrients on top of their regular diet. It uses carbohydrate sources like malt and corn syrup with soybean and salmon oils to deliver concentrated calories, along with a full blend of vitamins, minerals, and omega fatty acids. It’s intended for kittens who need help gaining or maintaining weight, or who aren’t eating as well as they should.
Nutritionally, this is a well-formulated high-calorie supplement for kittens that provides dense energy and a broad range of added vitamins and minerals. The fat content is appropriately high for a calorie booster, and the inclusion of salmon oil adds beneficial omega-3s. It’s not a complete diet on its own, but can be very useful alongside a balanced kitten food for underweight, recovering, or picky kittens under veterinary guidance.
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At a Glance
KibbleLab Review
Strengths
- Very calorie-dense (about 28 kcal per teaspoon), which is helpful for kittens that are underweight or not eating enough of their regular food.
- High fat content with soybean oil and salmon oil, providing both energy and useful fatty acids, including EPA and DHA for developing kittens.
- Contains a wide spectrum of vitamins and minerals (A, D3, E, B-complex, iron, manganese, etc.) to help support overall nutrient intake when regular food intake is low.
- Palatable, sweet, gel format that many kittens will readily lick, making it easier to administer than many other supplements.
Considerations
- This is not a complete and balanced kitten diet and should only be used as a supplement alongside a high-quality kitten food, not as the main food source.
- Most of the calories come from sugars (malt syrup, corn syrup, cane molasses), which is appropriate for a short-term calorie boost but not something you’d want to rely on heavily long term without a vet’s input.
- Contains salmon oil, so it may not be suitable for kittens with known fish allergies.
- Because it’s energy-dense, overuse could contribute to excessive weight gain in kittens that don’t actually need extra calories; dosing should follow directions and ideally be guided by your veterinarian.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Malt Syrup
Malt syrup, typically derived from malted barley, is used in pet foods as a sweetener, binder and flavor enhancer to improve palatability and texture while providing rapidly digestible carbohydrates. It supplies quick energy but has little protein or micronutrients, is high in sugars and calories (which can contribute to weight gain, dental issues or worsen diabetes), may cause gastrointestinal upset if overused, and contains gluten which could be a concern for animals with rare grain sensitivities.
02
Soybean Oil
Soybean oil is used in pet foods as a concentrated fat source and palatability enhancer, providing energy and omega‑6 fatty acids (primarily linoleic acid) that support skin and coat condition. Because it is calorie‑dense and higher in omega‑6 than omega‑3, formulators balance it with omega‑3 sources to avoid an inflammatory imbalance; highly refined soybean oil is unlikely to trigger soy protein allergies but can oxidize and should be stabilized and stored properly, and it does not supply the arachidonic acid cats require from animal fats.
03
Corn Syrup
Corn syrup is a liquid sweetener and humectant used in some pet foods and treats to add simple-carbohydrate energy, improve palatability, texture and moisture retention. It provides minimal essential nutrients, can contribute to excess calories, dental disease and poor glycemic control, and is of limited benefit for obligate carnivores like cats (which have reduced sensitivity to sweet tastes), so its use should be limited—particularly for overweight pets or animals with diabetes.
04
Cane Molasses
Cane molasses is a viscous sweetener and palatability enhancer used in pet foods and treats to add simple carbohydrates, help bind ingredients, and contribute trace minerals like iron, calcium, potassium and magnesium along with small amounts of B vitamins. It can improve taste and texture but is high in sugars and calories, so it should be used sparingly—excessive intake can contribute to weight gain, dental issues, or unstable blood glucose in diabetic or obese pets.
05
Salmon Oil
Salmon oil is used in pet foods as a concentrated source of fat and long‑chain omega‑3 fatty acids (EPA and DHA) to support skin and coat condition, reduce inflammation, and aid joint, cardiac and cognitive health in both dogs and cats (cats particularly benefit from preformed DHA). Because it is calorie‑dense and prone to oxidation, choose stabilized, quality‑tested salmon oil from reputable sources to avoid rancidity and contaminants, and consult your veterinarian for appropriate dosing or if your pet has a fish allergy.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
Brand
Under the Weather Pet is a pet food and supplement brand offering freeze-dried bland diets, broth toppers, and wellness chews for dogs and cats. The brand targets health-conscious pet owners seeking convenient, vet-formulated solutions for digestive upset and recovery support.
Visit Under the Weather PetManufacturer
All Under the Weather products are manufactured in the United States in facilities that follow FDA and USDA guidelines. The company emphasizes quality control, sourcing premium human-grade ingredients, and producing small batches to ensure safety and nutritional integrity.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Under the Weather Pet Ready Cal High-Calorie Kitten Supplement Gel has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Under the Weather Pet ever been recalled?
We have no recalls on record for Under the Weather Pet. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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