Sadly, most of my cats (the ones who needed it most) won't touch food that this is in, or liquid that it has been dissolved in. The others had no problem with it, but I probably won't buy it, again, if I can only use it for a few of the cats.UPDATED: 3 May, 2015 One of my cats, who has stomatitis, had been getting this in his food twice daily, with no issues. I reordered last month, and the formula seems to have changed. It no longer has a pleasant smell to it, and the kitty won't eat food with this in it, unless the food is stinky enough to cover the odor. Why did they change the flavoring and/or scent? Also annoyed at the huge price increase.

The cats have had no illnesses since they have been in it. Service was quick and the price was good compared to other products.

GREAT for AIDS cats will help guard against mouth herpes and other sore mouth disease EXTENDS LIFE!

I like it. The cats, not so much, but they are getting used to it. Start with a small pinch in their food then build up to desired dosage. It keeps their herpes dormant and minimizes other conditions. Good product. Much cheaper than Viralys.

Got this for my kitten who has feline herpes. Sprinkle it on wet food and he laps it up. It keeps him from having symptoms--does what it is supposed to do. Great product, will order again and again.

I have been giving this to my cat - who has feline herpes - everyday for 2 years now. She has never exhibited symptoms, so I am very pleased with this product. I can mix it in her food, and she gobbles it right up!

This is the third jar of L-Lysine we've used and the first of this name brand. Of the three I'd say this one is the most effective.

My kitties like this better than the paste or treat types, and it does seem to significantly help my herpes+ kitty.

My cats love the taste! Previously I'd tried a chewy supplement, but it was too hard for the kitten to chew and the older cat didn't like it. I'm excited to see if it clears up their drippy eyes caused by feline herpes. I will come back and update.The scoop is handy and I'm able to sprinkle it on dry food no problem.

I've used Viralys for 1.5 years and it's seemed to help my cat with her sinus issues. Her suffering has diminished and she's been symptom free for long stretches.I have noticed that I need to maintain a higher dose to keep her symptoms at bay. Lowering the dose does result in symptoms returning sooner.That is my issue with Felisyl (this product) vs. Viralys. I like that this was less expensive, but when I received it I compared labels and found this is half the strength per scoop. Upon opening, I found the scoop is BIGGER. I'll need to continue the therapeutic dosage level of Viralys meaning I'll be using two larger scoops where I was using one before. It will end-up way more expensive for me, so this will be one-and-done test before I return to Viralys.Just a watch-out as this isn't very evident on the disclaimers.I'll update if the cats don't tolerate well - so far the rating is strictly based on concentration and value.Update I dropped from two to one star - I've used Felisyl for about 4 weeks. Because of the larger scoop size, it adds much volume to the food I'm feeding my cat. She has recently stopped finishing her food and I've noticed her sneezing/watery eyes returning. I left out the Felisyl and she seemed happy to finish the serving, so I'm left believing it the added texture from the volume of product required for the dosing level. The only guaranteed food she'll finish with a full scoop is canned tuna - expensive but may be necessary to keep dosing level up and symptoms at-bay.

I have an extreme faced Himalayan. He is prone to URI's and my veterinarian recommended this product. My cat doesn't seem to notice this powder version in his meals and it seems to help keep him healthy. My cat also likes the paste form.

I have a cat with stomatitis. L-lysine combined with Plaque-Off is helping significantly. My cat seems to like the taste of this brand the best. I ,ix it in his food when he is eating well and dissolve in water to dispense when the mouth is bad.

I have two cats that came from the shelter with eyes herpes. This is wonderful to stop the constant eye drainage and irritation.

These products are hit and miss. My kitty didn't like this brand, so I'm trying another.4-Stars:My only complaint was when trying to mix this into the wet food, it didn't want to dissolve. It's very coarse - I'm not sure if that was a factor when trying to incorporate it into her food.When I was able to get her to eat it, her eyes stayed goop free, so it definitely works. If your kitty doesn't like one brand of a lysine product - don't lose hope, just try another brand. Sometimes it just takes trial and error to find a remedy.*Always check with your vet before starting any home remedy*

Cat eats it fine mixed in her food, and I loved the sale price. Thanks from me and my cats.

If you're worried that your cat will not eat his/her food because of the taste of this product, have no worries. The scoop that you use is about 1/8th of a tsp. I place two scoops in his food once per day to keep his chronic herpes infection under control. I use this product in his evening meal, mixed into wet food. Never turns his nose up. In fact, I think he likes his food more!!

I have an older cat who has FIV. This supplement helps his immune system fight off the virus. I tried a different brand, but this one seems to be better for my cat and his symptoms! Thanks!

Effective to eliminate mild infections and most of the cats like it, as long as its not in every meal.

Was glad I finally found this for my kitties. Local pet food stores do not carry the powder only the chewable treats! My kittens never even noticed it in their food! :)

I help several cats that have a virus that is controlled by l-lysine. This product helps with that, when given on a daily basis.

My cats had digestive issues, and eye issues so I got this. It works well. I now have the treat kind though because i had to use wet food with this kind since it is powder.

have two cats from The Pound..and were very under nurished ..gave them this in there food daily..and they look and feel wonderful..there hair was stragely..now..thick and shiny, there eyes, gooey and now, clear...beautiful.. One gets sick withs cold weather changes, she doesn't go out..windows left open for a nice breeze..see it coming on, (sneezing)..and give her a bit more..and she's better!..works...

I went to a well established veterinary opthamalogist for my foster cat with herpes sore in her eye yesterday. He said a study done a few years ago revealed that lysine doesn't work unless you give it to the cat at the initial breakout of herpes.

Simba doesn't like much and he has a great nose to sniff things out but to my surprise he eats his food. I was shocked by that....because I have a Finicky Feline when it comes to food.

I liked the ease of using this product and my cats really seemed to enjoy the taste. I've tried to use the paste type before, but no-one was a fan, including me because it ended up all over my fingers! With this, I can just sprinkle it on top of their canned food and they eat it all up.

This lysine mixes well with canned food, and the cat doesn't seem to notice the difference in his food. Since he needs the lysine in his diet, and the price on this product is better than some, I think we will buy more.

My vet recommended I use lysine for treatment of my cats recurring herpes. I had a bag of it that he gave me but lost it during a move. I ordered this product and I like it better than what I had from the vet. Unlike what the vet gave me, Felisyl comes in a screw lid container so I can shut it completely and not worry about it spilling. It also has a nice measuring scoop enclosed. I sprinkle a scoop into my kitty's wet food and most of the time he gobbles it up. He's a picky eater so there are times he won't eat any of his food, so I don't blame the Felisyl. As far as it's effectiveness, the jury is still out on that one. However, the vet recommended, so I'm hoping evenually it will slow his outbreaks down.

My cats are all over the counter and try to stick their face in the container when I open it. I have 11 cats and my 2 recent kittens were diagnosed with felv after being with us over a month. My vet recommended lysine and this is a great value also for me in addition to the cats liking it!

This lysine product agrees with my cat much more effectively. She does cough after ingesting it.Please do not discontinue this product. It's very effective!