Strawfield Pets L-Lysine Immune Support Cat Supplement, 7-oz jar

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At a Glance

  • Grain-Free
  • No Corn No Wheat No Soy
  • Immune Support
  • Eye Care
  • All Lifestages
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$33.05 Chewy Price
($4.73 /oz)
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About This Item

Details

  • Features just 2 pure ingredients—L-lysine granules blended with chicken liver powder for a taste your sidekick will adore.
  • Made to be shelf stable, with a texture that kitties love—and it’s easy to hide in food if your companion is feeling particularly picky.
  • Designed to be easy to pair with other immune-boosting supplements or nutrients without causing any interference.
  • Completely free of artificial additives, dyes, sweeteners, flavors, and preservatives.
  • Made in the USA and packaged with a BPA-free plastic jar and scoop.

Ingredient Information

Feeding Instructions

Instructions

FAQ

Frequently bought together

Questions & Answers

10 Customer Questions

Can this be given to a 7 week old kitten?

Where is this sourced?

Answer by Chewy • Dec 13, 2019
Strawfield Pets supplements are manufactured in the USA and ingredients for the L-Lysine supplement are sourced in the USA.

Is these safe for breast feeding cats?

Answer by Chewy • Mar 13, 2020
This supplement is suitable for nursing cats.

Does this come with a scoop?

Answer by Chewy • May 29, 2025
A 1-gram scoop is included.
Reviews
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4.3
Rated 4.3 out of 5 stars
271 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Effectiveness

82% Positive

Form and Administration

77% Positive

Ingredients

86% Positive

Nutritional Value

81% Positive

133 Customer Reviews

Rated 5 out of 5 stars
By Terra on Nov 15, 2025

Great value for a much needed supplement

I was worried about getting a powder version of L-lysine supplement but the one cat of mine that needs It badly for environmental allergies stopped liking the treats

I was worried about getting a powder version of L-lysine supplement but the one cat of mine that needs It badly for environmental allergies stopped liking the treats version and gel version (another brand name for those) so, I decided to try this. The little scoop it comes with is great, the powder is kind of fine and you have to be careful with it when opening and closing. I put a dose in my Finley's wet food in the center and covered it. The first time, seemed like she may have tried to avoid eating that portion some, so next few times put smaller amount in and built it back up to regular dose of half scoop 2 times a day. Since then, she is eating that portion of wet food. I also try to put the gravy from wet food on top of powder before covering it with more food. Seems to be working good now with her eating it. I hope she continues as I need her to have this supplement. Therefore I am very happy with purchase!

Rated 5 out of 5 stars
By Debra on Nov 8, 2025

Decent price.

My 12 yr. old cat PollyAnna had been sneezing, coughing, runny nose, and watery eyes for months (I think she got a resperatory infection from the vet in Aug. when

My 12 yr. old cat PollyAnna had been sneezing, coughing, runny nose, and watery eyes for months (I think she got a resperatory infection from the vet in Aug. when she gone in for her check up, blood work and yearly shots, I think another cat might have been infected any either the vet or one of the techs. infected my cat) well I did extensive research online and it all lead to an upper respiratory infection (by the way my kitty is an indoor kitty doesn't go out at all) and the reports I read up on all said that L-lysine would help and seen that it cost $400.00 in Aug. for the vet I can't really afford to take her back and have another bill that large just yet so tried the L-lysine first before running to vet again. The L-lysine worked wonderful and she is doing great now with no complications at all.

Rated 5 out of 5 stars
By Linda on Nov 14, 2025

It worked tried vets other meds this did the best

I rescue cats moved to new home a lot of pregnant cats and more sick ones. Each litter born no one survived so we get the mom fixed this went on and on kept trying

I rescue cats moved to new home a lot of pregnant cats and more sick ones. Each litter born no one survived so we get the mom fixed this went on and on kept trying save a cat, 3 years down the road most momma cats fixed still sick seen this product fed to cats the green slime out of nose gone on most the wheezing down 95% so use the liquid and the powder the liauid once week put in their water change whats left next morning just cannot see the outside critter suffer. I have 25 cats here now fixed there is 3 females showed up giving them meds they can spend rest of their lives here healthy and in peace.

Rated 5 out of 5 stars
By Genevieve on Jan 8, 2026

Great for sniffles and sneezes

Using this product has greatly reduced reliance on prescription steroids to control the symptoms. Significant flares still need the prescription for a few days

Using this product has greatly reduced reliance on prescription steroids to control the symptoms. Significant flares still need the prescription for a few days. This appeals as the prescription is not healthy to take long term,

Rated 1 out of 5 stars
By Jayne on Dec 17, 2025

Still Have Not Received Order

Ordered on the 12th and still in transit to be delivered on the 22nd. Ten days to receive when appears to be coming from NC to CA? Unhappy. We have 6 feral cats

Ordered on the 12th and still in transit to be delivered on the 22nd. Ten days to receive when appears to be coming from NC to CA? Unhappy. We have 6 feral cats that need product to help fight respiratory virus.

Rated 1 out of 5 stars
By Leslie on Nov 6, 2025

Milo doesn’t approve :(

The vet recommended L-Lysine supplements for his eye issue. He doesn’t really eat his food when I add this supplement and the few times that he did eat, I didn’t

The vet recommended L-Lysine supplements for his eye issue. He doesn’t really eat his food when I add this supplement and the few times that he did eat, I didn’t really notice a difference compared to a different brand I’ve tried. Hopefully it works for everyone else’s fur baby!

Rated 5 out of 5 stars
By tori on Dec 21, 2025

fixed my cats health immediately

my cat was sneezing with nose bubbles and crusty eyes for days then i sprinkled this in his food and he cleared up so fast

my cat was sneezing with nose bubbles and crusty eyes for days then i sprinkled this in his food and he cleared up so fast

Rated 4 out of 5 stars
By pat on Dec 18, 2025

I think it was ok

the cats didn't like if I put it on their cat food for some reason{on top } but if I mixed in their wet food they eat it.

the cats didn't like if I put it on their cat food for some reason{on top } but if I mixed in their wet food they eat it.

Rated 5 out of 5 stars
By jen on Dec 13, 2025

To build the cats immune system.

One of my cats has had eye problems a couple of times. I give them this occasional to prevent sickness.

One of my cats has had eye problems a couple of times. I give them this occasional to prevent sickness.

Rated 1 out of 5 stars
By Thelma on Sep 12, 2025

Strong smell

I have been having a hard time getting my baby to eat his food with this product, I’ve tried many different ways including with the treat's he loves but just not

I have been having a hard time getting my baby to eat his food with this product, I’ve tried many different ways including with the treat's he loves but just not working. The smell is pretty strong unfortunately it did not work for us. May work for others