Under the Weather L-Lysine Soft Chews Cat Supplement, 60-count
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Give your BFF amino acid support with Under the Weather’s L-lysine Soft Chews Cat Supplement. It contains a generous amount of L-lysine, an amino acid that helps your feline friend maintain a normal immune system response and respiratory function. These veterinarian-formulated soft chews are manufactured in Vermont without any corn, artificial flavors or dyes and have a purr-worthy whitefish flavor your kitty will go head-over-tail for! Not only will your kitty love the taste, but she’ll also enjoy the cute fish-shape design.
Key Benefits- Offers your adult cat amino acid support.
- L-lysine is an amino acid that may help support your kitty’s respiratory system and normal immune system response.
- Soft chews with a palatable whitefish flavor.
- Completely free of corn, artificial flavors and dyes.
- Made in the USA.
For animal use only. Keep out of the reach of children and animals. In case of accidental overdose, contact a health professional immediately.
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Item Number180464
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Weight3.17 ounces
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LifestageAdult
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Food FormSupplement
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Product FormSoft Chew
Brewers Dried Yeast, L-Lysine Monohydrate, Vegetable Glycerin, Whitefish, Sunflower Lecithin, Arabic Gum, Coconut Oil, Guar Gum, Buffered White Distilled Vinegar, Citric Acid, Silicon Dioxide, Tetrasodium Pyrophosphate, Vegetable Oil, Natural Mixed Tocopherols (A Preservative), Rosemary Extract (Natural Flavor), Green Tea Extract (Natural Flavor), Spearmint (Natural Flavor).
Caloric Content3400 kcal/kg, 5.1 kcal/chew (1.5 g)
Guaranteed Analysis | |
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Crude Protein | 40.3% min |
Crude Fat | 8.3% min |
Crude Fiber | 1.5% max |
Moisture | 11.5% max |
L-Lysine Monohydrochloride | 250 mg |
Weight | Daily Feeding (chew) |
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Up to 15 lbs | 1 |
Over 15 lbs | 2 |
Why should I include vitamins & supplements in my pet’s diet?
Most commercial pet foods include baseline vitamins and nutrients, but some may not have the adequate amount to suit your pet’s exact health needs. Like in humans, vitamins and supplements can help support your pet’s long-term health, regulating everything from digestion to muscle growth. Consult your veterinarian to determine the best vitamins and supplements for your furry friend.
How often should I give this supplement to my pet?
It is recommended to give the suggested dosage based off your pet’s weight. Please refer to the Feeding Instructions tab and consult with your veterinarian for more information.
Is this supplement safe to use with the medication my pet is currently taking?
If your pet has a medical condition and is taking other medication, we recommend consulting with your veterinarian to ensure that this supplement is safe to use.
My pet is allergic to certain ingredients, will this product be safe to use?
For a complete list of ingredients, click on the 'Nutritional Info' tab, next to the 'Description' tab, just under the product photos. If you are unsure about the safety of this product for your pet, we recommend consulting with your veterinarian.
Does this product come in other product forms?
For a complete assortment of products by the manufacturer of this supplement, click on the link next to the item name at the top of the page. You can also find an assortment of supplements across all product forms on our page.

Simple Feline Health Solutions
When your kitty needs a little extra support, turn to Under the Weather to keep her feeling her best. Their functional chews and gel supplements are designed to help address specific health issues cats may face, to foster everyday wellness and promote overall well-being.


Formulated to Help Cats Thrive
Vet-formulated Under the Weather chews contain different special ingredient blends to help with five common feline health concerns. Choose from Urinary, Hairball and Calming formulas, or try Probiotic for digestive support and L-Lysine for healthy immunity.
Made with Trusted Ingredients
Under the Weather makes its chews in Vermont, using veterinarian-formulated recipes with no corn, artificial flavors or dyes. These functional chews have a whisker-licking whitefish flavor your cat will love and natural ingredients you can feel good about, too!


High-Calorie Supplements
If your cat is losing weight or not eating well, try Under the Weather’s Ready Cal high-calorie gel nutritional supplement. Ready Cal provides extra calories and essential vitamins and minerals to help your kitty feel better and gain or keep on weight. Feed it directly or mix it into food—it has a taste cats love and the nutrients they need for extra energy.
Loose Stool Relief
When stress and other factors upset your furry friend’s digestive balance, you need to act fast. Ready Balance oral probiotic gel gets to work quickly to help restore that delicate balance and promote welcomed relief from worrying symptoms like vomiting and diarrhea.

About Under the Weather
Under the Weather was founded with the mission of helping pets live happier and healthier lives. They make supplements and dietary products for pets, to help busy pet parents meet the health challenges their trusted companions face. A portion of every sale supports their charitable effort Ruffy Rescue, founded in 2017 to help save the lives of dogs in high-kill shelters. Ruffy Rescue helps provide transport and spay and neuter funding for thousands of shelter dogs, so they can find the loving homes they deserve.

Customer Reviews

40% Recommend
40% of reviewersrecommend this product
You've Already Reviewed This Item
5 Reviews
5 Reviews
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Extremely hard.
By Sarra on Jul 3, 2020
Description says soft but these are rock hard. My cat won't touch them.waste of money.
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Not For My Cat:
By MsKitty on Mar 10, 2020
I thought this L-Lysine might help my cat. But it made him sicker. It might work on other cats, but not mine.
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my cats do not like the flavor
By kittycrazy on Apr 25, 2020
none of my cats will eat them they apparently do not like the flavor
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Healthy Supplement
By Marth on Nov 24, 2019
I have 2 older cats, both strays. I give them this supplement for their over all well being. One cat loves to eat, thinks its a treat. The other, picky about flavors, I need to break-up and put in her food. She then will consume with her morning breakfast. There health is great. Recommend for all cats young and old.
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Did not eat
By Wendy on Nov 10, 2019
We have 9 fur babies trying to keep them healthy. Unfortunately we could not get any of the babies to eat one. We will continue to put the powder in their food.