Immune Booster Supplements and Foods for Dogs and Cats

Posted By Ayda Hornak on September 2025

Quick Take: Immune booster supplements and foods for dogs and cats are the foundation of a strong, healthy immune system. By combining the right diet with natural immune supplements, you can help your pet fight illness, recover faster, and enjoy a longer, healthier life.

Why is your pet’s immune system so important?

Your cat and dog’s immune system is their first line of defence against infections, toxins, and chronic diseases. It protects them from everyday bugs, helps wounds heal, and supports long-term health.

By adding immune-boosting foods and supplements, you give your dog or cat the extra resilience they need to thrive.

A well-functioning immune system is vital for your pet's health and longevity

What are immune booster supplements for dogs and cats?

Immune booster supplements are natural blends of vitamins, minerals, antioxidants, and medicinal ingredients designed to strengthen your pet’s defences.

Unlike synthetic vitamins, PetWell RELIEF Allergy + Skin + Coat + Immunity is made from 100% human-grade, all-natural ingredients. It supports immunity while also helping with skin conditions, seasonal allergies, and coat health.

Benefits of immune supplements for dogs and cats:

✔️ Extra support for puppies and kittens, and senior pets
✔️ Help during stressful times (moving house, travel, vet visits)
✔️ Relief for allergies and skin conditions
✔️ A boost after illness or surgery

What’s in PetWell’s RELIEF Supplement?

Formulated by a pet naturopath and vet reviewed, RELIEF contains powerful immune-boosting ingredients for both dogs and cats:

Moringa Leaf & Nettle Leaf – antioxidants and vitamins for allergy support

Shiitake Mushrooms – beta-glucans that activate immune cells

Oyster Extract & Green Lipped Mussel – zinc, selenium, omega-3s for strong immunity

Turmeric & Burdock Root – natural anti-inflammatories that reduce oxidative stress

Wheatgrass & Barley Grass – nutrient-dense greens for detox and cell health

Spirulina – gut-friendly superfood that boosts antibody production

Beetroot – rich in antioxidants, vitamin C, iron, and folate to support healthy blood and immune cell function

Available as a powder for daily meals or as functional treats, freeze-dried venison infused with RELIEF.

Allergy & Skin Relief for Dogs & Cats – PetWell RELIEF

When should you consider immune supplements for pets?

Your dog or cat may need an immune booster if they are:

A puppy or kitten with a still-developing immune system
A senior pet prone to illness
Experiencing stress or lifestyle changes
Suffering from allergies or chronic conditions
Recovering from surgery or illness
Daily wellbeing, prevention is better than cure

Best immune-boosting foods for dogs and cats

1. Lean proteins

Chicken, turkey, venison, and lean beef provide amino acids that fuel immune cell production and antibody function.

2. Omega-3 for Dogs and Cats

Omega-3 fatty acids are powerful natural immune boosters. They reduce inflammation, improve skin and coat health, and strengthen immune defences.

Best sources of Omega-3 for pets:

Salmon & Green Lipped Muscles – rich in EPA and DHA
Sardines – concentrated omega-3s, low in heavy metals
Mackerel & Anchovies – excellent alternatives for variety

Try PetWell Freeze-Dried Salmon Fillets, New Zealand Green Lipped Muscles or Freeze-Dried Sardines, single-ingredient, human-grade treats packed with omega-3 goodness.

3. Vegetables

Pumpkin, sweet potato, carrots, broccoli, and leafy greens provide vitamins A and C, plus antioxidants that strengthen immunity. Steam or puree for easier digestion.

4. Yoghurt

Plain, unsweetened yoghurt delivers probiotics, which build a healthy gut microbiome, closely linked to immune strength.

5. Turmeric

Turmeric’s active compound, curcumin, has natural anti-inflammatory and antioxidant effects that support immune health.

A strong immune system relies on a variety of factors, and these foods contribute to overall well-being by reducing inflammation, supporting gut health, and providing the necessary building blocks for immune cells and antibodies

FAQs About Immune Boosters for Dogs and Cats

Q: What’s the best immune booster for dogs and cats?

A mix of immune-boosting foods (like salmon, pumpkin, turmeric) and a daily supplement such as PetWell RELIEF provides the best natural support.

Q: Can puppies and kittens have immune supplements?

Yes. Puppies and kittens often benefit as their immune systems are still developing. Always choose a natural, vet-reviewed formula like PetWell RELIEF.

Q: How can I naturally boost my pet’s immune system?

Feed a balanced diet, add omega-3-rich foods, use probiotics, reduce stress, ensure daily exercise, and give a natural immune supplement.

Q: Are PetWell immune supplements safe for daily use?

Absolutely. PetWell RELIEF is made from 100% human-grade, natural ingredients and is safe for everyday use in both dogs and cats.

Final Takeaway

Your pet’s immune health is the foundation of their well-being. With the right diet, natural immune-boosting foods, and a daily supplement like PetWell RELIEF, you can keep your dog or cat strong, resilient, and full of life.

Explore the full PetWell RELIEF range and give your pet the immune support they deserve.

Disclaimer: The entire contents of PetWell emails and website are not to be taken as medical advice. The team at Pet Squad Pty Ltd trading as PetWell encourages you to make your own pet health care decisions based on your research and in partnership with a qualified pet healthcare professional.

Posted By Ayda Hornak - Trained in Canine Psychology and Natural Animal Nutrition Care

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