How to test for food sensitivities

If you are trying to work out how to test for food sensitivities – whether for yourself, your family, or your dog – it can be hard to know where to start. This page walks through the main options, how at-home intolerance testing works, and how ItchyDOG’s non‑invasive hair tests can help you narrow down possible triggers before or alongside veterinary or medical advice.

When you are ready, you can use our simple food intolerance testing kit to collect a small hair sample at home and receive results by email.

Ways to test for food sensitivities

There isn’t a single, universal way to test for food sensitivities. Most people and pet owners use a combination of:

Symptom tracking – noting when itching, digestive upset, or other symptoms appear or worsen
Elimination diets – strictly removing and re‑introducing foods to see what changes
At‑home intolerance testing – sending a sample (such as hair) for lab analysis
Veterinary or medical investigations – especially where symptoms are severe or worsening

For dogs and other pets, ItchyDOG focuses on at-home intolerance testing using hair analysis. This is designed to be a practical first step that can help you reduce guesswork and plan more targeted diet and lifestyle changes.

How at-home intolerance tests work

At ItchyDOG, our at‑home intolerance tests use bioresonance analysis of a small hair sample.

You collect 5–7 strands of hair (no root needed)
The sample is sent to a UK laboratory
Specialised equipment measures energetic frequencies from the hair sample against hundreds of foods and environmental items
You receive a detailed report by email, usually within 24–72 hours of the sample reaching the lab
A practical action guide helps you decide what to change or monitor next

This approach is:

Non‑invasive – no needles, blood tests, or vet visit required
Stress‑free – suitable for both short‑ and long‑haired dogs
Practical – checks over 400 food and environmental items, plus vitamin and mineral insights (for our standard dog intolerance test)

Hair‑based intolerance tests are classed as Complementary and Alternative Medicine (CAM) and are not currently recognised by conventional medicine due to limited scientific research. They are intended as a supportive tool, not a medical diagnosis.

How to test a dog for food sensitivities at home

If you are wondering how to test for food sensitivities in dogs specifically, an at‑home intolerance test can be a useful starting point.

1. Notice patterns and symptoms

Common signs that lead owners to explore food intolerance in dogs include:

Itchy or irritated skin
Paw licking or chewing
Ear irritation or recurring ear issues
Red or inflamed patches
Digestive upset, bloating, or nausea
Hot spots, hair loss, or yeasty skin

ItchyDOG’s Advice Hub also covers issues like dogs with food sensitivities and dogs with skin issues, so you can explore potential triggers in more depth.

2. Use a food sensitivity testing kit

A dog‑specific food sensitivity testing kit lets you collect a hair sample at home in just a couple of minutes.

With our dog intolerance test:

Only 5–7 hairs are required
Hair does not need to be pulled from the root
Short‑haired dogs can be tested
Results usually arrive within 24–72 hours of the sample reaching the lab
You receive a list of items where your dog showed a higher response, plus a bonus vitamin and mineral overview

Many owners use this as a first step before committing to strict elimination diets or higher‑cost veterinary allergy tests. While no test can guarantee 100% accuracy, feedback from clients frequently describes it as a helpful way to narrow down options and focus their efforts.

3. Adjust diet and environment

Your report is designed to support practical changes, such as:

Rotating or removing highlighted food ingredients
Reviewing treats and chews for hidden triggers
Considering environmental factors like grass, mites, or cleaning products

Owners tell us this has helped them take more informed action:

“Recommended first step to help an itchy dog... getting the intolerance test done has been a very useful first step and at £39.99 I would highly recommend it.” – Sarah, Isle of Man

“Very simple and quick process, and results are easy to understand.” – Alan, Douglas, Isle of Man

For ongoing digestive issues, some clients also choose to test gut health with a separate dog gut health test.

How to test for food sensitivities in yourself or your cat

ItchyDOG also offers cat intolerance testing and references human intolerance testing using hair analysis.

For cats:

At‑home hair testing is intended for cats with scratching, recurring ear issues, or upset stomach
The test checks 400 food and environmental items
The process is similar to our dog test and aims to help you identify and remove possible triggers

For humans, the website notes that hair analysis intolerance testing is available, though detailed product information is not provided here. As with pets, this is described as an intolerance test, not an allergy test, and is not a medical diagnosis.

If you are considering a wider panel, our over‑900‑item option (listed on the test kits page) includes additional checks such as vitamins, minerals, heavy metals, gut microbiome, and hormone‑related items.

To explore current options, you can browse our intolerance test kits.

How much does food sensitivity testing cost?

For dogs, ItchyDOG’s standard at‑home pet intolerance test is listed at £39.99, with the test for people £49.99.

By comparison, our blog on dog allergy test cost in the UK explains that veterinary allergy testing can range from £150 to £800+. At‑home intolerance tests generally fall between £30 and £100.

Our aim is to provide a lower‑cost, practical starting point to reduce trial‑and‑error spending on foods, shampoos, and repeated appointments.

ItchyDOG intolerance testing in the UK

We serve clients across the United Kingdom, with testing carried out in a UK laboratory and in a variety of locations worldwide. Everything is designed so you can complete food sensitivity testing at home without a clinic visit.

If you have questions before you order, you can contact the team by email at hello@itchydog.uk or by phone on 07624 344435.

What to expect from an ItchyDOG intolerance test

When you use an ItchyDOG pet intolerance test, the process is straightforward:

Order your chosen test kit online
Select from our standard dog and cat tests or the over‑900‑item option.

Collect a small hair sample at home

Take 5–7 strands of hair or fur
No root needed
Suitable for short‑ and long‑haired dogs

Post the sample to the lab
Instructions are included in the kit.

Receive results by email

Usually within 24–72 hours after the lab receives your sample
Includes 400+ items (standard test) or over 900 items for the extended panel
Bonus vitamin and mineral information is included

Use the action guide
Our practical guide helps you interpret your results and consider next steps at home, such as diet changes or discussing findings with your vet.

Throughout, we emphasise that this is intolerance testing, not allergy testing, and that results do not replace professional veterinary or medical advice.

FAQs - how to test for food sensitivities in the UK

Is an intolerance test the same as an allergy test?

No. ItchyDOG provides intolerance testing, not allergy testing. Allergies involve the immune system and can cause sudden, severe reactions. Intolerances are usually slower‑building digestive or sensory sensitivities. Our tests are non‑diagnostic and do not replace veterinary or medical allergy tests.

How can I test my dog for food sensitivities at home in the UK?

You can use an at‑home dog intolerance test that uses hair analysis. You collect a small hair sample at home, post it to the UK lab, and receive results by email. This can help you decide which foods or environmental items to review first.

How long do results take once I post the sample from the UK or Isle of Man?

Results are usually sent by email within 24–72 hours after your sample reaches the laboratory. Postal times will vary depending on where you are in the UK, but once the lab receives the sample, the analysis itself is typically completed within this 24–72‑hour window.

Can I rely on a hair test instead of seeing a vet or doctor?

No. Hair‑based intolerance tests are a Complementary and Alternative Medicine (CAM) tool. They can provide useful insight into potential food and environmental sensitivities, but they are not a medical diagnosis and do not replace professional veterinary or medical advice. If symptoms are severe, worsening, or worrying, you should contact your vet or doctor.

What symptoms suggest my dog may benefit from a food sensitivity test?

Owners often consider an intolerance test for dogs with:

Ongoing itching or dogs itchy skin
Paw licking or chewing
Ear irritation, sore or smelly ears
Digestive upset, bloating, or nausea
Red, inflamed, or yeasty skin

Our guides on food intolerance in dogs and itchy dog no fleas explore these issues in more detail.

How accurate are at-home food sensitivity tests?

No test can guarantee 100% accuracy. ItchyDOG describes its intolerance tests as supportive, non‑diagnostic tools that help highlight possible sensitivities for further investigation. Many clients report that using a test as a first step helped them focus their elimination diets and reduce trial‑and‑error.

Can I use one test kit for multiple pets?

Each result needs its own clearly labelled sample. Our pricing is set per test, and the cat, dog, and over‑900‑item options are listed individually on our intolerance test kits page.

When should I seek urgent veterinary help instead of home testing?

If your dog shows signs such as sudden swelling, hives, collapse, or difficulty breathing, this can indicate a serious allergic reaction and should be treated as an emergency. For any severe, painful, or rapidly worsening symptoms, you should contact your vet promptly.

Ready to move from guesswork to clearer direction? Order an at‑home intolerance kit today and take your first practical step in how to test for food sensitivities.