• Immune Support - Dr S Fight Back (Dogs and Cats)

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Products sold by Pet Megamart are intended for animal use only unless explicitly stated otherwise. They are not intended for human consumption or human medical use.


Unless specifically labeled for food-producing animals, products are not intended for birds or animals whose meat or eggs will be consumed by humans. Customers are responsible for complying with all local, state, and federal regulations regarding animal use and food safety.


These products are not intended to diagnose, treat, cure, or prevent any disease unless expressly stated and legally permitted. Always consult a licensed veterinarian before administering any supplement or medication.


Keep out of reach of children. Store according to label instructions. Do not exceed recommended dosage guidelines.

Immune Support - Dr S Fight Back (Dogs and Cats)

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$22.99 USD
$22.99 USD

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Dr S Fight Back Immune Support

When your dog seems run down, is recovering, or just is not quite themselves, good nutrition for the immune system matters. Dr S Fight Back is a once-a-day powder for food, made to nourish the immune system.

DrS developed this immune supplement for dogs with vitamins A, D3, E and C, a broad mineral mix, the amino acids lysine and methionine, and herbal and yeast extracts. They recommend feeding it for at least 10 to 14 days.

Quick facts

  • Brand: Dr S (DrS Animal Care)
  • Form: powder, fed on food
  • For dogs of all sizes
  • Once a day, for at least 10 to 14 days
  • Vitamins, minerals, amino acids, herbal and yeast extracts
  • Size on this listing: 80 g

Before using

  • Read the label on your pack first
  • Weigh your dog to set the daily amount
  • See your vet if your dog is ill
  • Keep giving any medication your vet prescribed

What Fight Back is for

DrS describes Fight Back as an immune system support supplement that helps with recovery and supports the production of white blood cells, the body's natural defence system.

  • Recovery after illness or a stressful time
  • Dogs that seem run down
  • Ongoing immune support when you feel it is needed

How to use

  • Feed once a day on food
  • 30 kg (large) dog: 3 g
  • 20 kg (medium) dog: 2 g
  • 10 kg (small) dog: 1 g (about 10 pinches)
  • Scale down by bodyweight for dogs under 10 kg
  • Feed for at least 10 to 14 days, longer if needed

Directions from DrS Animal Care. If your pack shows different directions, follow the pack.

Ingredients

Group Listed ingredients
Vitamins A, D3, E, C, B1 (thiamine), B2, K, biotin, choline bitartrate, folic acid, niacin, pantothenic acid
Minerals Selenium, iron, cobalt, manganese, copper, magnesium, zinc, sulphur, sodium, iodine
Other Lysine, methionine, herbal and yeast extracts

Helpful next reads

Support, not treatment: Fight Back is a nutritional supplement. It does not diagnose, treat, cure or prevent infection, allergy or any disease. If your dog is unwell, see your vet, and do not stop prescribed treatment.

For animal use only. Keep out of reach of children.

Frequently asked questions

How much Fight Back do I give?

Once a day on food: 3 g for a 30 kg dog, 2 g for 20 kg and 1 g for 10 kg. Scale down by bodyweight for dogs under 10 kg.

How long should I use it?

DrS recommends at least 10 to 14 days, and longer if needed.

Can I give it to a small dog or puppy?

Scale the amount to your dog's weight from the rates above. Ask your vet before using any supplement in a young puppy.

Is it a replacement for my vet's treatment?

No. It is a nutritional supplement. Keep following your vet's advice.

Immune Support - Dr S Fight Back (Dogs and Cats)

$22.99 USD

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Is veterinary guidance recommended before using this product?

While many avian and small animal products are available without an in-person veterinary visit, proper diagnosis is important. Birds and small animals can be highly sensitive to stress, and treatment decisions should always be made carefully. We recommend consulting a licensed veterinarian to confirm the appropriate product and dosage for your animal’s specific condition.

If a prescription product is required, we can help facilitate consultation with a licensed veterinarian where appropriate.

Is this product safe for my pet?

When used according to label directions, this product is intended for animal use. Always follow the instructions carefully and review the product description for species suitability and administration guidance. If you are unsure, consult a veterinarian.

Unless specifically labeled, products are not intended for human consumption or for animals intended for meat or egg production for human consumption.

How is this product administered?

Administration instructions are provided on the product label and in the product description. Depending on the formulation, this product may be given orally, mixed in drinking water, applied topically, or added to feed. Always follow dosage guidelines carefully and consult a veterinarian if you are unsure about proper administration.

How quickly will this product ship?

Orders placed before 12:00 PM MST typically ship the same business day (Monday–Saturday, excluding holidays). We offer real-time calculated shipping rates and expedited options at checkout. We ship within the United States only.

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