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Vet Talks: Ozzy and Coconut Fight Feline Herpesvirus (FHV)

Vet Talks 3 min read
Ozzy laying down on the couch looking into the camera, and Coconut looking up while stretching on a scratching post. Dr. Amanda's two cats with Feline Herpesvirus

A few months ago, my partner and I decided to adopt two kittens. This decision came after many years of living in Canada and the loss of my 16-year-old kitten, Frederico. It was a long road to adopt my kittens.

After many visits to the place where they were available for adoption, we decided to apply for two twin tuxedo sisters. Ozzy Melinda and Coconut Sylvester. However, we did not expect that these little ones had Feline Herpesvirus. It was a challenge to take care of them and, in this blog, I will share how we did this, and how we succeeded.

What Is Feline Herpesvirus (FHV)?

The virus often infects the surface tissues of the eyes.

Feline Herpesvirus (FHV) is a common upper respiratory infection in cats. Most cats are exposed to this at some point during their life. In some cats, the virus is not cleared (cured) but only goes into remission and can become reactivated during times of stress or illness. The virus often infects the surface tissues of the eyes, affecting the cornea (clear front part of the eye) and conjunctiva (the tissues inside the eyelids).

ozzy, black and white cat on the sofa

Clinical Signs of Feline Herpesvirus

Signs are highly variable and range from mild conjunctivitis to life-threatening illnesses. In severe cases, signs of respiratory infection, fever, loss of appetite, lethargy, conjunctival swelling, corneal ulceration and rupture, and copious ocular and nasal discharge may occur.

Secondary bacterial infections are also common in these cases. Signs are usually the most severe in kittens and unvaccinated cats. Kittens with severe ocular inflammation may develop symblepharon, in which the eyelids and conjunctiva adhere to each other to the cornea.

Diagnosing Feline Herpesvirus

In severe cases and in cases with respiratory signs, these often allow a presumptive diagnosis to be made. Signs are less specific in chronic cases, although FHV is suspected to play a role in many cases of chronic conjunctivitis in cats. Scrapings may be taken from the conjunctiva to assess the type of cells present and to look for evidence of the virus and other agents.

Specialized tests for FHV are available and utilize samples from the eye, nose, windpipe, or blood. If a secondary bacterial infection is suspected, bacterial cultures may be performed.

black and white cat

Treatment & Natural Support

Treatment is targeted at active FHV infections. Although there are some scientific studies criticizing oral Lysine, for my kittens I opted to use oral Lysine. Lysine is an inexpensive supplement that can be used long term to try to keep the virus in remission.

In addition to this, I used antibiotics, discomfort medication, Natures Immuno, Resp-Aid, and Felimm, as they were sneezing. I used protective lubricants on their eyes and eye drops.

Prognosis For Cats With FHV

Early and adequate vaccination helps prevent FHV, especially in the most severe cases. Severe infections do not often recur if the cat has a good immune system but low-grade signs of FHV may occur sporadically throughout the cat’s life.

two black and white cats on a sofa, looking up

Diet For Cats With Feline Herpesvirus

It is especially important to maintain a healthy and balanced diet to help their immune system while they are fighting the virus. I opted to maintain both a wet diet twice a day and some kibbles. I always had to pay attention if they were eating enough food. We also gave some natural treats, such as chicken that they really love. We are also heating up the food so they can smell it to get them excited and know what’s coming.

black and white cat

Now, Ozzy Melinda and Coconut Sylvester are having an amazing and lovely life with us, and they are also bringing a lot of happiness to our life. They are such sweet furbabies.


If your cat is suffering from Feline Herpesvirus, please do not hesitate to reach out to us by clicking on the button below.

Dr. Amanda Nascimento DVM, MVSc, PhD

Dr. Amanda Nascimento DVM, MVSc, PhD

Dr. Amanda completed her undergraduate degree in veterinary medicine in 2010 and graduate studies in veterinary pathology (MVSc. 2012 and PhD 2016) at the School of Veterinary Medicine, University of São Paulo. She completed her post-doctoral training at the Western College of Veterinary Medicine – University of Saskatchewan in 2018. Dr. Nascimento will be hosting her own blog series and sharing her knowledge with our extended NHV family.

Published: May 2, 2020

4 replies

  1. Nicole says:

    Just found out my cat has feline herpes FHV. Which product do you recommend as the most effective?

    1. Team NHV says:

      Hi Nicole,

      We are so sorry to hear about your kitty’s herpes diagnosis. As pet parents ourselves, we know how hard it is to see our little one’s struggling.

      Our main recommendations for feline herpesvirus are Felimm: https://www.nhvnaturalpetproducts.com/felimm-for-feline-leukemia and Natures Immuno: https://www.nhvnaturalpetproducts.com/natures-immuno-medicinal-mushroom-blend-cats

      If your little one also has been experiencing eye issues due to the disease, OcuLove can help. If your cat has signs of respiratory issues, like sneezing, we also suggest Resp-Aid.

      We’re sending lots of love and healing vibes to your kitty. Please feel free to let us know if you have any questions at all.

      Yours in wellness,
      Team NHV

  2. Lisa C says:

    Hello, My cat was diagnosed with FIV but negative for Leukemia. She was pregnant when we took her in. She has had 2 girls and 1 boy cat. The boy is showing no signs of illness but the girls are. They has been scratching around their chin and mouth and there eyes are runny. Been giving them Imuquin Immune support powder and also I bought Felimm For cats NHV. Can I use this on all the cats or just mom. Kittens are about 4 months old and in process of getting fixed. Mom has already been fixed as soon as she was done nursing them. My worries can I use Felimm for cat if she is negative for Leukemia but positive for FIV??

    1. Team NHV says:

      Hi Lisa,

      Thank you for your question – it is great you are taking extra steps to ensure the health of these fur babies ❤️

      Felimm is designed to support conditions caused by viruses, so you can use Felimm for cats with FIV. Specifically, Felimm may encourage detoxification of the lymphatic system, stimulate the appetite, and improve energy levels.

      Normally, we would recommend this routine to kittens after all vaccines and deworming treatment is completed. However, as the situation is critical, we would suggest to use Felimm alongside Natures Immuno to support the immune system of your fur babies. Natures Immuno may help with chronic infections and with balancing the immune system.

      Please give your kitties half the recommended minimum dosage, while giving your adult cat the full dosage.

      As a note, we are not familiar with other brands, so we aren’t sure about how they will fit in to an NHV routine. We’d recommend cross-checking the ingredients to ensure there is no overlap between our formula and their’s.

      Sending you and your furmily healing purrs! Please let us know if you have any further questions ☺️

      Yours in wellness,

      Team NHV

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