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)

$23.99

Added to wishlistRemoved from wishlist 0
Add to compare


Price: $23.99
(as of Oct 18, 2025 10:51:48 UTC – Details)

Product description

High Calorie Gel Supplement for catHigh Calorie Gel Supplement for cat

Delicious Taste Easy to use Essential Nutrients
1 Delicious Taste

2 Easy to Use

3 Essential Nutrients

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. How to use Merchant Video

How many calories are there in a teaspoon of Ready Cal?

There are 28 calories per teaspoon.

Once opened does the Ready Cal need to go into the fridge?

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.

Where is this made?

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.

Can this be added to my pet’s food?

Yes – We encourage you to serve in whatever way is most convenient for you and your pet.

What should I do if my pet doesn’t like the flavor?

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!

For Kittens & Cats

Why a High Calorie Supplement?

Weight loss can quickly lead to malnutrition and further health issues. Adding a high-calorie supplement will help provide essential calories your pet needs daily to gain or maintain a healthy weight. This supplement can also help to stimulate your pet’s appetite and boost their energy.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Ready Cal for Healthy Cats Merchant Video

Vet-Formulated High-Calorie Supplement for Cats & KittensVet-Formulated High-Calorie Supplement for Cats & Kittens

Helps Support Shelter PetsHelps Support Shelter Pets

Is Discontinued By Manufacturer ‏ : ‎ No
Package Dimensions ‏ : ‎ 10.47 x 1.69 x 1.61 inches; 3.5 ounces
Item model number ‏ : ‎ Cat Supplements 7
Date First Available ‏ : ‎ July 6, 2018
Manufacturer ‏ : ‎ Under the Weather
ASIN ‏ : ‎ B07FN5MLTY
Best Sellers Rank: #1,546 in Pet Supplies (See Top 100 in Pet Supplies) #2 in Cat Multivitamins
Customer Reviews: 4.1 4.1 out of 5 stars 8,560 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

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.

Customers say

Customers find the pet supplement effective, with many reporting their pets gained several pounds and their appetites improved significantly. Moreover, the product helps sick cats and older pets recover, and customers appreciate its easy-to-administer syringe style. However, the taste receives mixed feedback, with some cats enjoying it while others refuse to eat it. Additionally, opinions on value are divided between those who find it worth the price and those who consider it not worth the cost.

6 reviews for 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)

0.0 out of 5
0
0
0
0
0
Write a review
Show all Most Helpful Highest Rating Lowest Rating
  1. JeriOwl

    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!

    Helpful(0) Unhelpful(0)You have already voted this
  2. Dialysis life

    Literally saves lives
    We run an informal cat sanctuary, this has saved lives. I was not wanting to spend this much but now I am glad I did. 2 kittens decided to stop eating and I put a little on their side a couple times a day and they bounced back in 3 days. Helps emaciated kittens get to a healthy weight. Must have! Tube lasts a decent amount of time. Worth the money!

    Helpful(0) Unhelpful(0)You have already voted this
  3. Vince

    Vet was impressed!
    Wonderful product, took my cat to vet because of not eating and getting weak. Found out she is sevely anemic, showed vet this product I had ordered, she was very pleased with all the vitamins and supplements, especially the iron which is what my cat needs right now. I was placing it on her paw so she would have to eat it. This morning I offered it on my finger and she ate it herself. She is a very picky eater so I am pleased she likes it . Hoping it helps 🤞🏻Would definitely recommend 👍🏻

    Helpful(0) Unhelpful(0)You have already voted this
  4. Candice Sanchez

    Cat doesn’t like, but seems to be feeling better.
    My cat is feeling better but it is hard to make him eat it. I have to rub it inside his mouth. He won’t eat it on his own.

    Helpful(0) Unhelpful(0)You have already voted this
  5. Jae

    Highly recommend
    We had a stray kitten that my daughter saved she almost ran her over. After she got her spayed which she was about 2 months she got very sick with respiratory infection .she was given antibiotics but still would not want to eat so we had to force feed her which was very hard she would spit it out mostly. I was given other food substitution which was not working..so I read on these reviews and decided to try it due to all the benefits it has. Surly that next day she started eating on her own. She is so small and was barely surviving very boney..now she loves to eat and has a great appetite..I’m still giving her this because although she’s eating more like very well she’s still pretty small. This really helped so so much. I’m so happy and grateful to this medication and of course God..I highly recommend to get this my kitten didn’t have much hope according to the doctor she was super weak. She wouldn’t eat she couldn’t meow and always slept didn’t have energy to walk around. She is now about 4 months but is the size of a 2 month but is now stronger and more alive. Her eyes and face is so much different as well. I like it because it’s restore is like peanut butter so I put it in her mouse and she has no choice but to eat it she can’t spit it out.

    Helpful(0) Unhelpful(0)You have already voted this
  6. Amazon Customer

    Life-Changing! Saved My 14 Year Old Cat’s Life!
    I can’t even put into words how grateful I am for this product. My cat had been slowing down, and I honestly thought it was just age catching up with her. She was confused, disinterested, sleeping constantly, and not even responding to her name. It broke my heart to think I was losing her.Then my sister mentioned maybe she needed electro lights; and then found this on Amazon. I started giving her this, and the difference is unbelievable. Within a short time, she completely turned around – like she’s young again! She’s alert, playful, and full of energy. It truly feels like I got my cat back. And to make it better my cat LOVES it, she gets a little bit of this every night and she won’t leave me alone until I give it to her. If you’re on the fence, just try it. I truly believe this saved my cat’s life; and that is priceless. Also this is not a paid review or anything like that. It’s real 🙂

    Helpful(0) Unhelpful(0)You have already voted this

    Add a review

    Your email address will not be published. Required fields are marked *

    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)
    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)

    $23.99

    Best Deals for all new
    Logo
    Compare items
    • Total (0)
    Compare
    0
    Shopping cart