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Using functional mushrooms may not be a new concept, but giving them to our dogs and cats certainly is! And while there are other pet products available that feature these funghi, when you take a look at the rest of their ingredients (often including fillers, additives, and by-products), it’s “paws-itively” scary!

That’s why we created HOLY CAP - to provide the highest quality mushroom powered supplements that only use pure extracts and sustainably sourced ingredients to help improve your pet’s health, wellness, and vitality.

The inspiration

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Haru hobbled around with joint pain and energy depletion due to old age.

HOLY CAP was inspired by three best friends - Haru, Daisy, and Sumi - a playful pack who shared a significant thing in common: long-term health issues that impacted their daily lives.

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Daisy dealt with allergies leading to raw, flakey & itchy skin.

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Sumi suffered from irritable bowels and digestive problems.

Their parents (our co-founders) tried to treat these issues with a number of different products but found that most options on the market contain artificial ingredients, additives, fillers, chemicals, and other synthetic substances. It was time to disrupt this industry with mushroom powered pet supplements containing pure, transparent, and sustainable ingredients that actually work!

That’s when HOLY CAP was born!


HOLY CAP’s mushroom powered pet supplements are created in collaboration with veterinary surgeon and homeopath, Dr. Vicky Simon. Dr. Simon is a fully qualified veterinary surgeon who practises integrated veterinary medicine by combining conventional and holistic approaches.

Upon graduating from London’s Royal Veterinary College in 2012, Dr. Simon spent 7 years in two small animal integrated veterinary practices that focused on using conventional medicine, surgery, and diagnostics alongside herbal medicine, homeopathy, natural feeding, and acupuncture.

During this time, she also completed a veterinary acupuncture course, a veterinary herbal medicine course, and qualified as a veterinary homeopath in 2019. Dr. Simon is particularly passionate about functional mushrooms and uses them extensively in her own holistic medicine referral practice in Somerset, South West England to help treat a wide range of conditions in cats, dogs, and other animals.