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"I’ll admit that I’m not usually someone who is loyal to a particular brand, and I never really understood the concept…until I discovered Fettle. I have complete confidence that what I’m giving my dogs is high quality, carefully curated with their best interests in mind, and delivers exactly what it promises... I can’t imagine using anything else because, at the end of the day, Fettle works."

Anonymous

- Verified Customer

lion's mane mushroom tincture for dogs - PRESALE!

Cognitive support mushroom tincture - 50ml

supports their brain & focus

activates the protein behind healthy nerve cell growth

used and trusted for centuries

best-seller

biggest savings

'this sh*t better work guarantee'

If it doesn't work, we don't deserve your money. We made this for our own dogs first. And we stand behind it, completely. If you try it and don't see a difference we'll refund you, no stress, no stupid hoops. Because your dog's health isn't a gamble. And neither is your money

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made in UK

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delivery from XX date

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24/7 support

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only 1 ingredient

As Seen In

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what our happy customers are saying

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A mushroom-backed way to sharpen focus, protect nerve cells & keep working dogs switched on

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A working dog that can’t stay focused?

You rely on your dog to have sustained focus, day after day. Lion's Mane is the only natural compound known to stimulate nerve growth factor - the protein responsible for keeping nerve cells alive and firing. That's the actual mechanism behind sharper focus. Fed consistently, it supports the nervous system your dog relies on to stay focused.

An older dog who is showing signs of cognitive decline?

Many dogs struggle with seasonal or year-round flare-ups from grass, pollen, or unknown triggers. This gentle, plant-based powder supports their immune response without the harsh side effects of medicated treatments.

Easy to store and add to food

Store in a cool, dry place like your cupboards and use the dropper to add the tincture onto your dog’s food. It’s easy and convenient, but it will make such a difference.

Just 1 natural ingredient

Most supplements are a long list of ingredients doing a vague job together. This one isn't. It's Lion's Mane, full stop. No fillers or bulking agents, just the mushroom, extracted properly so the compounds that matter (hericenones and erinacines) are actually bioavailable. One ingredient, doing what it's always done.

we only use 100% natural,

wholefood ingredients

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our ingredients

how much do they need?

quality ingredients

100% Lions Mane mushroom

how much do they need?

Small dog (<10 kg): X drops

Medium dog (11–25 kg): X drops

Large dog (26–39 kg): X drops

Extra large dog (>40 kg): X drops


XXXX kcal/kg and 0.XX cal per drop


Drop onto their food or directly onto their tongue.

our favourite ways to use

a super topper

directly drop into their mouth

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why pet owners chose fettle

100% natural


Great for working dogs 

Easy to feed


Support brain and cognotion

Made in the UK

others mushroom supplements

add Lion's Mane your basket

have questions? we've got the answers.

What are the ingredients used in your supplements?

Are your tinctures suitable for all dogs & cats regardless of breed or size?

How are your tinctures sourced, and do you test for contaminants?

How do I determine the right dosage of tincture for my dog based on their weight?

Can this tincture be mixed with any type of pet food?

How often should these tinctures be administered? Is it safe for long-term use?

What are the specific benefits I can expect to see in my pet after using Lions Mane?

Are there any known side effects associated with these supplements?

What is the shelf life of your tinctures?

What is your return policy if I’m not satisfied with the product?