

🐾 Fuel your feline’s comeback with every scoop!
Under the Weather Ready Cal Powder is a veterinarian-approved, high-calorie supplement designed to stimulate appetite and promote healthy weight gain in cats of all life stages. Packed with 20 calories per serving, 9 essential vitamins, and 6 vital minerals, this chicken-flavored powder supports energy, immunity, and overall wellness. Easy to mix and free from artificial additives, it’s the trusted choice for cats recovering from illness, stress, or those needing extra nutritional support.






| ASIN | B0DWP3FNSJ |
| ASIN | B0DWP3FNSJ |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #4,904 in Pet Supplies ( See Top 100 in Pet Supplies ) #16 in Cat Multivitamins |
| Brand Name | undertheweatherpet |
| Customer Reviews | 4.1 4.1 out of 5 stars (420) |
| Date First Available | February 10, 2025 |
| Date First Available | February 10, 2025 |
| Included Components | Ready Cal Powder for Cats | High-Calorie Weight Gainer & Appetite Stimulant | Cat Energy Booster Veterinarian-Approved Pet Supplement with Vitamins & Minerals | Chicken Flavor |
| Item Dimensions LxWxH | 3.57 x 3.65 x 4.24 inches |
| Item Package Dimensions L x W x H | 3.74 x 3.7 x 2.72 inches |
| Item Weight | 0.21 Kilograms |
| Item model number | Under the Weather |
| Item model number | Under the Weather |
| Manufacturer | undertheweatherpet |
| Manufacturer | undertheweatherpet |
| Model Name | Under the Weather |
| Product Dimensions | 3.57 x 3.65 x 4.24 inches; 7.37 ounces |
| Specific Uses for Product | Weight |
| Target Audience Keyword | house-cats |
C**S
Effective and easy way to help my cat gain weight
I’ve been using this product for a few weeks now, and I’m really impressed with the results. My cat had been underweight and struggling to maintain a healthy weight, but since starting this supplement, I’ve noticed a steady, healthy increase in her weight. She seems more energetic, playful, and overall healthier. The product itself is easy to use — it mixes well with food, and my cat doesn’t mind the taste at all. I appreciate that it’s formulated specifically for feline nutrition, so I feel confident giving it to her daily. The instructions are clear, and the recommended serving sizes make it simple to monitor progress without overfeeding. Overall, this has been a game-changer for my cat. It’s helping her regain weight safely and steadily, and I feel good knowing I’m supporting her health in a manageable way. I highly recommend this to anyone whose cat needs a little help gaining weight or improving overall nutrition.
A**R
Weight loss from stomatitis
My cat's been fighting with stomatitis and he had lost a lot of weight. I'd gotten this stuff out of desperation to try to get him to eat more and maybe gain some weight. I took it with me to the next vet appointment and showed the vet. He was reading the ingredients cuz he was looking for certain things. He approved it and said to keep giving it to him. So right now I'm adding it to his food cuz he's now eating better after getting some treatment at the vet which he seems to be looking a little better so for now I'm going to say this is a good product. Of course it's also easy to use which helps.
H**K
Enticing and nutritious
This is a good supplement. I have a fussy 9 y/o who's had pancreatitis for a couple of years. Her weight tends to drop too much because she isn't really food focused. Sprinkling this supplement on her food gets her interested, and I know she's getting her nutrition. Her weight is up and this is part of her success story!
A**T
Highly recommended!
All my cats love this product! They definitely eat less when I forget to sprinkle it on their food. I told our veterinarian about it. He said that they are always looking for a good appetite stimulant and he was happy with the ingredients.
I**H
Expensive, no returns, cat isn't interested
My cat refuses to eat now, sucks because I was hopeful but no matter what I do she will not eat it. Expensive, not worth the gamble.
M**E
This is a great product.
I have tried this ready cal powder on two kitty's. First was a senior with cancer. She didn't like it, wouldn't eat it. It would have been a great help to slow her weight loss. But she refused to eat anything and didn't last long after her diagnosis. So,we adopted an 8 month old kitten from our local SPCA. Merle is a BIG boy! He looks like he is 8 years except in his face he is still very kittenish. He was a little lethargic and his fur was dry/dull. He was 8 lbs but looked skinny for his size. We tried multiple foods & lots of it but he was not gaining weight. I started sprinkling the Ready Cal powder on his food. HE LOVES IT! He cant get enough. He recognizes the tub at feeding time. He has gained two lbs and his fur is healthy & soft. He is very playful and has tons of energy now. This high calorie powder is easy to use ,smells good. It has lots of vitamins & minerals that his food must be lacking. He has zero issues with it. It might not work in every situation but this is a great product.
A**A
My cat is way too picky
Sadly it didn’t work for my cat, is taking me forever to make her eat and adding this powder is just worse, but I don’t think is the product is my cat that is sooo picky and I don’t understand why, she was a cat street 😕. The reason I’m giving 3 star is because I can’t return it… really good reviews I’m sad honestly. I was super excited getting this product
E**Y
GOOD FIND
WORKS WONDERFUL FOR OUR SENIOR CAT THAT NEEDS SOME WEIGHT ON HIM…..
Trustpilot
3 weeks ago
3 weeks ago