---
product_id: 87074983
title: "Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc)"
brand: "under the weather"
price: "€ 51.16"
currency: EUR
in_stock: true
reviews_count: 3
category: "Under The Weather"
url: https://www.desertcart.hr/products/87074983-under-the-weather-pet-ready-cal-for-cats-100cc-high
store_origin: HR
region: Croatia
---

# 10 vitamins & 7 minerals High calorie energy boost 100cc precise dosing Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc)

**Brand:** under the weather
**Price:** € 51.16
**Availability:** ✅ In Stock

## Summary

> 🐾 Boost your cat’s comeback story with every squeeze!

## Quick Answers

- **What is this?** Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc) by under the weather
- **How much does it cost?** € 51.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/87074983-under-the-weather-pet-ready-cal-for-cats-100cc-high)

## Best For

- under the weather enthusiasts

## Why This Product

- Trusted under the weather brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Safe Ingredients:** Made in the USA without artificial dyes or flavors—because your cat deserves the best.
- • **Rapid Appetite Stimulation:** Formulated to revive even the pickiest or sickest cats, turning mealtime into a treat.
- • **Power-Packed Nutrition Blend:** 10 essential vitamins, 7 minerals, and omega fatty acids fuel appetite, weight gain, and vitality.
- • **Veterinary-Formulated & Trusted:** Backed by vets and loved by rescue farms, it’s a proven lifesaver for fragile felines.
- • **Precision Dosing for Optimal Care:** Convenient dial-a-dose tube ensures your cat gets exactly what they need, no guesswork.

## Overview

Under The Weather Ready Cal for Cats is a 100cc high-calorie gel supplement designed to help cats regain weight and energy. Packed with 10 vitamins, 7 minerals, and omega fatty acids, it stimulates appetite and supports recovery from illness or stress. The easy-to-use dial-a-dose tube delivers precise nutrition, making it a veterinary-formulated, trusted choice for all life stages and breeds.

## Description

desertcart.com : Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc) : Pet Supplies

Review: SAVES LIVES on our farm where we frequently rescue sick kittens - Because of our rural location people frequently dump cats near us where often the pregnant momma kitties make their way to our farm to have their kittens. Because of our unique setup with an auto feeder loaded with premium kitty food, the momma cats usually move their kittens to our enclosed catio when it's time to teach their babies to eat solid food thereby making it easier to catch and tame their Littles. Often there's one or more runts or sick kittens in most litters so we keep a fresh unopened tube of this Under the Weather on hand especially during Kitten Season. We've found almost every kitten has found this tasty treat absolutely delightful - after a small dab on the lips, they then willingly lick or nibble off a small squeeze until their tummies are full. By the 2nd or 3rd time they've had Under the Weather they regard us as safe creatures and no longer run allowing us to readily pick them up, they actually seem to look forward to getting this nutrient booster as a well deserved treat. If there's a really sick kitten we put a small amount of this Under the Weather and extra vitamin B1 thiamine in a bit of red cap whole milk, syringe feeding if they're too weak to drink themselves. If they have a bit of gunky eye we also add a dab of l-lysine powder. When they're 4 weeks of age we also treat with Baycox ie toltrazuril 10% then we repeat the toltrazuril 10 days later, especially if they've had diarrhea at all. Using this as our farm kitty rescue "protocol" we now save nearly 100% of the kittens who we can get our hands on. We re-home as many as possible, the rest are fixed and remain in our farm cat colony. We've been using Under The Weather for several years now - EVERY tube has been top quality and has definitely been vital in our effort to save lives; even kittens our vet was convinced no way would survive let alone thrive are now healthy active stout 12-15 pound farm cats. We have one cat who initially was a sick baby no one thought he'd survive, he was doing great until a farm accident, now as a tripod he's once again a strong agile kitty who readily scales trees and hay bales with only 3 legs. Everyone is amazed at his mobility and his vibrant health - again, Under the Weather definitively made the difference in his life, both as a kitten and as an adult recovering from a nasty infection developed within his deep lacerations prior to him literally dragging himself home for amputation surgery. ALL rescues, rehabs and farms should keep Under the Weather on hand to use for the sick or weak furballs. I'd give far more than 5 stars if possible, cannot recommend enough!
Review: This stuff works! - My cat was sick with a cold or virus and she stopped eating everything I tried to entice her but nothing she had lost so much weight I really thought I was gonna lose her. So I googled and your product popped up I liked the reviews so I ordered it and the product made my cat do a total turn around in just a few days she is eating like no tomorrow and slowly putting on weight this product is A1 in my book.

## Features

- Helps Cat Gain Weight - Filled with healthy ingredients to help your cat gain weight if they aren't eating properly. Shelf life: 24 months from manufacturing date. EXP date printed beside the barcode as EXP MM/YY.
- Stimulates Appetite - When your cat isn't getting proper nutrition due to reasons such as illness or medical procedures, this nutritional supplement gel will help restore your kitty's appetite to keep them healthy and strong.
- Energy Booster - Vitamins, minerals, carbohydrates, and omega fatty acids are essential nutrients to boost your cats weight, appetite and energy.
- Easy to Use - This gel supplement for your cat comes in a convenient dial-a-dose tube to ensure that you’re able to give your kitty the proper dosage it requires.
- The Best For Your Cat - Ready Cal for Cats is veterinary-formulated with tasty flavor cats love to promote weight gain. Proudly manufactured in the USA without artificial flavors or dyes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FN5MLTY |
| ASIN  | B07FN5MLTY |
| Age Range Description | All life stages |
| Best Sellers Rank | #1,715 in Pet Supplies ( See Top 100 in Pet Supplies ) #4 in Cat Multivitamins |
| Brand Name | Under the Weather |
| Breed Recommendation | All Breed Sizes |
| Color | Under The Weather |
| Customer Reviews | 4.0 4.0 out of 5 stars (5,462) |
| Date First Available | July 6, 2018 |
| Date First Available  | July 6, 2018 |
| Directions | x |
| Included Components | Product |
| Is Discontinued By Manufacturer  | No |
| Item Package Dimensions L x W x H | 10.47 x 1.69 x 1.61 inches |
| Item Weight | 3.5 Ounces |
| Item model number | Cat Supplements 7 |
| Item model number  | Cat Supplements 7 |
| Manufacturer | Under the Weather |
| Manufacturer  | Under the Weather |
| Model Name | Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc) |
| Package Dimensions  | 10.47 x 1.69 x 1.61 inches; 3.5 ounces |
| Specific Uses for Product | Stomach |
| Target Audience Keyword | dogs, house-cats |
| Warranty Description | x |

## Product Details

- **Brand:** Under the Weather
- **Flavor:** For Cats 100cc
- **Item Form:** Gel
- **Item Weight:** 3.5 Ounces

## Images

![Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc) - Image 1](https://m.media-amazon.com/images/I/81KQLt5wd-L.jpg)

## Available Options

This product comes in different **Flavor** options.

## Questions & Answers

**Q: How many calories are there in a teaspoon of Ready Cal?**
A: There are 28 calories per teaspoon.

**Q: Once opened does the Ready Cal need to go into the fridge?**
A: No, it is still shelf stable as long as the cap is put back on! This product has a shelf life of 2 years from date of manufacture.

**Q: Where is this made?**
A: Under the Weather is headquartered in Vermont, USA. Ready Cal is manufactured in the USA using ingredients from trusted sources around the country and world.

**Q: Can this be added to my pet's food?**
A: Yes - We encourage you to serve in whatever way is most convenient for you and your pet.

**Q: What should I do if my pet doesn't like the flavor?**
A: We recommend you try placing the Ready Cal on the top of your pet's paw or nose. Most pets will instinctively lick it off. If not, try mixing it with a bit of warm water and adding to their daily food. You might also try putting it on a treat!

## Customer Reviews

### ⭐⭐⭐⭐⭐ SAVES LIVES on our farm where we frequently rescue sick kittens
*by J***L on August 9, 2025*

Because of our rural location people frequently dump cats near us where often the pregnant momma kitties make their way to our farm to have their kittens. Because of our unique setup with an auto feeder loaded with premium kitty food, the momma cats usually move their kittens to our enclosed catio when it's time to teach their babies to eat solid food thereby making it easier to catch and tame their Littles. Often there's one or more runts or sick kittens in most litters so we keep a fresh unopened tube of this Under the Weather on hand especially during Kitten Season. We've found almost every kitten has found this tasty treat absolutely delightful - after a small dab on the lips, they then willingly lick or nibble off a small squeeze until their tummies are full. By the 2nd or 3rd time they've had Under the Weather they regard us as safe creatures and no longer run allowing us to readily pick them up, they actually seem to look forward to getting this nutrient booster as a well deserved treat. If there's a really sick kitten we put a small amount of this Under the Weather and extra vitamin B1 thiamine in a bit of red cap whole milk, syringe feeding if they're too weak to drink themselves. If they have a bit of gunky eye we also add a dab of l-lysine powder. When they're 4 weeks of age we also treat with Baycox ie toltrazuril 10% then we repeat the toltrazuril 10 days later, especially if they've had diarrhea at all. Using this as our farm kitty rescue "protocol" we now save nearly 100% of the kittens who we can get our hands on. We re-home as many as possible, the rest are fixed and remain in our farm cat colony. We've been using Under The Weather for several years now - EVERY tube has been top quality and has definitely been vital in our effort to save lives; even kittens our vet was convinced no way would survive let alone thrive are now healthy active stout 12-15 pound farm cats. We have one cat who initially was a sick baby no one thought he'd survive, he was doing great until a farm accident, now as a tripod he's once again a strong agile kitty who readily scales trees and hay bales with only 3 legs. Everyone is amazed at his mobility and his vibrant health - again, Under the Weather definitively made the difference in his life, both as a kitten and as an adult recovering from a nasty infection developed within his deep lacerations prior to him literally dragging himself home for amputation surgery. ALL rescues, rehabs and farms should keep Under the Weather on hand to use for the sick or weak furballs. I'd give far more than 5 stars if possible, cannot recommend enough!

### ⭐⭐⭐⭐⭐ This stuff works!
*by C***R on February 23, 2026*

My cat was sick with a cold or virus and she stopped eating everything I tried to entice her but nothing she had lost so much weight I really thought I was gonna lose her. So I googled and your product popped up I liked the reviews so I ordered it and the product made my cat do a total turn around in just a few days she is eating like no tomorrow and slowly putting on weight this product is A1 in my book.

### ⭐ Consult Vet before use. My cat died
*by V***C on May 7, 2024*

My foster cat needed a some teeth extracted. While waiting for her surgery day, I had to syringe feed her because she had stopped eating on her own. She was 4 years old and had no other medical issues that we knew of. She had lost a lot of weight and wasn’t eating full portions because her teeth were in bad shape. So I did some research and came across this product. I blended the recommended dose in with her food and she ate it up. The next morning, I noticed she was breathing a little harder but figured it was the stress of it all. I fed her her usual along with another dose of this supplement that morning. When I got home from work the same evening, I noticed her breathing had gotten significantly worse. I called the rescue I was fostering from to see what vet to take her to (since they work with specific vets). We didn’t make it to the vet. She started twitching as I placed her in the carrier, possibly had a heart attack or a seizure. I took her out of the carrier right away but she died in my arms. There was no autopsy so I don’t know for sure why she died. Maybe it’s a coincidence it happened soon after using this product. Maybe this product interacted negatively with the medication (gabapentin or the Lactaid Ringer) she was taking. Or maybe she had a medical condition no one knew about. I’ll never know but I’ll always wonder if she died because of me, because I gave her this and it triggered a negative reaction. So please, consult a vet first

## Frequently Bought Together

- Under The Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc)
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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-13*