Why Is My Pet Itchy? Can Diet Help My Dog or Cat’s Skin and Coat?
Share
If your dog or cat is scratching more than usual or their coat has lost its shine, you’re not alone. Many pet owners worry about what’s causing the itch and whether changing food could help. Let’s look at what might be behind the scratching and how nutrition fits into the bigger picture.
Key Takeaways
- Itching is the most common skin sign of food allergy in dogs and cats, but not all itching is caused by food allergy [1].
- Essential fatty acids, especially linoleic acid, are crucial for healthy skin and coat in both dogs and cats [3].
- Cats need arachidonic acid from animal fats, which isn’t found in plant oils [5].
- Grain-free diets are not proven to be hypoallergenic and may have other considerations [12].
Caveat: This article is for educational purposes only, based on expert and brand sources, and does not constitute individual veterinary advice. Always consult a veterinarian for persistent or severe skin issues.
Why Do Pets Scratch? What Else Could It Be?
Itching is often the first thing owners notice when something’s not right with their pet’s skin. While food allergy can cause itchiness (and sometimes ear problems in dogs), it isn’t the only reason pets scratch [1]. Other causes include parasites, infections, and environmental allergies. If your pet has ongoing itch, hair loss, or skin changes, it’s time for a vet visit. Nutrition is just one piece of the puzzle, and a full checkup can help rule out other issues [2].
How Do Fatty Acids Help My Pet’s Skin and Coat?
- Dogs and cats need linoleic acid (an omega-6 fatty acid) in their diet for healthy skin and a shiny coat [3].
- These fatty acids help form the skin’s barrier, keeping moisture in and irritants out.
- Deficiency can lead to a dry, flaky coat and other health problems, but this is rare with complete commercial diets [4].
What’s Special About Cats and Fatty Acids?
- Cats need arachidonic acid, another omega-6 fatty acid, which is only found in animal fats [5].
- Unlike dogs, cats can’t make enough arachidonic acid from plant oils, so animal-based fats are essential for them.
Are All Omega-3s the Same?
- Marine sources (like fish oil) provide EPA and DHA, which are better absorbed by pets than plant-based ALA [6].
- Dogs and cats can’t efficiently convert plant oils to the long-chain omega-3s they need [6].
Does the Omega-6:Omega-3 Ratio Matter?
- There’s a recommended maximum ratio of 30:1 for omega-6 to omega-3 fatty acids in dog diets [7].
- Some studies suggest a lower ratio may be better, but there’s no single “best” ratio for every pet [7].
What About Zinc and Protein for Skin Health?
- Zinc deficiency is rare with modern, balanced diets but can cause skin scaling and redness, especially in some Arctic breeds [8].
- High-quality protein with all essential amino acids is important for healthy skin and a shiny coat. Cats also need taurine, an amino acid not found in plants [9].
How Is Food Allergy Diagnosed in Pets?
- If your pet’s itch is ongoing and not seasonal, food allergy might be considered [10].
- The only reliable way to diagnose a food allergy is with a strict elimination diet, followed by a challenge to see if symptoms return [1][10].
- Blood and skin tests alone can’t confirm a food allergy [1][10].
Allergy vs. Intolerance: What’s the Difference?
- Food allergy involves the immune system, while intolerance does not [11].
- Both can cause similar signs, but they’re different processes [11].
Is Grain-Free Food Better for Sensitive Pets?
- “Grain-free” is a marketing term, not a guarantee of being hypoallergenic [12].
- Grain isn’t the most common allergen, and grain-free diets aren’t proven to prevent allergies [12].
- There’s been a possible link noted between some grain-free diets and heart issues in dogs, but no proven cause [12].
Nutrition and Skin: How Does PLATINUM Fit In?
PLATINUM uses a Fleischsaftgarung (FSG) process, cooking at low temperatures to help keep the natural nutrients in fresh meat and its juices. This results in a nutrient-rich food with protein, creatine, and iron [13]. PLATINUM’s FSG dry dog food is made with 70% fresh meat for adults (73% for puppies) and no meat meals [15]. The recipes include ingredients like salmon oil, flaxseed oil, green-lipped mussel extract, and botanicals such as carrots and broccoli [16]. The brand states their protein digestibility is 93%, which is higher than conventional extruded foods, thanks to the high fresh-meat content [14].
How Do Common Causes of Itching Compare?
| Cause | Typical Signs | Reliable Diagnosis Method |
|---|---|---|
| Food allergy | Itching, ear issues, nonseasonal | Elimination diet with challenge [1][10] |
| Parasites/infections | Itching, skin changes | Veterinary exam |
| Environmental allergy | Itching, often seasonal | Veterinary exam |
| Nutrient deficiency | Dry, flaky coat, inactivity | Diet history, veterinary exam [4][8] |
Comparing Fatty Acid Sources for Pets
| Fatty Acid Source | Main Nutrients Provided | Suitability for Dogs | Suitability for Cats |
|---|---|---|---|
| Animal fats | Linoleic & arachidonic acid | Yes | Yes (essential) |
| Fish oil (marine) | EPA & DHA | Yes | Yes |
| Plant oils (flaxseed) | Alpha-linolenic acid (ALA) | Limited (poor conversion) [6] | Limited (poor conversion) [6] |
Quick fact: PLATINUM’s FSG dry dog food is prepared with 70% fresh meat for adults and 73% for puppies, with no meat meals [15].
FAQ
What are some non-dietary causes of itching in pets?
There are many potential causes of itching in dogs and cats, including parasites, infections, and environmental allergies. A veterinarian can help determine the underlying cause.
Can a change in diet alone resolve my pet's skin problems?
While nutrition plays a role in skin and coat health, persistent or severe skin issues should be evaluated by a veterinarian to rule out underlying medical conditions.
Is it safe to supplement my pet's diet with fatty acids or zinc?
Supplementation should only be done under veterinary guidance, as excess or inappropriate supplementation can be harmful.
How long does it take to diagnose a food allergy with an elimination diet?
The full diagnostic process, including elimination, challenge, and confirmation, can take weeks to months.
Are plant oils sufficient for my cat's fatty acid needs?
Cats require arachidonic acid, which is found in animal fats but not in vegetable oils, so plant oils alone are not sufficient.
Food allergy or food intolerance?
Which signs does your pet mostly show?
Mostly itching & skin
Possible food allergy
An immune response that often shows as itchy skin, sometimes with tummy upset.
Mostly tummy upset
Possible food intolerance
A non-immune reaction, usually digestive, such as loose stools or gas.
Both are best confirmed with a vet-guided elimination diet, not by guesswork.
Read next
Sources
The guidance in this article is based on recognised veterinary and pet-nutrition authorities, including:
- WSAVA — World Small Animal Veterinary Association
- FEDIAF — European Pet Food Industry Federation
- AAFCO — Association of American Feed Control Officials
- Merck (MSD) Veterinary Manual
- Peer-reviewed veterinary and scientific literature
- Official PLATINUM technical documentation
Numbered markers [n] in the text indicate a statement supported by these sources.
Editorial oversight by Daniel Jimenez — Director, Platinum Petfood Thailand. Sources reviewed: WSAVA · FEDIAF · AAFCO · Merck Veterinary Manual. Last reviewed: July 2026.
Featured photo: @pepper.graphy — official PLATINUM brand ambassador.