NexGard Spectra Chewables for Extra Large Dogs 66.2–132 lbs (30.1–60 kg) – Flea, Tick & Heartworm Prevention (Red)

NexGard Spectra Chewables for Extra Large Dogs deliver complete monthly parasite protection in a single beef-flavored chew. Combining afoxolaner and milbemycin oxime, NexGard Spectra (Red) protects extra large dogs weighing 66.2–132 lbs (30.1–60 kg) against fleas, ticks, heartworm, and the most common intestinal worms — six parasites covered with one chew, once a month.

No vet prescription required. Order online and ship direct to the USA and Canada.

What NexGard Spectra Protects Against

• Fleas: Kills adult fleas before they reproduce.
• Ticks: Controls black-legged (deer), American dog, lone star, and brown dog ticks.
• Heartworm: Prevents heartworm disease, transmitted by infected mosquitoes.
• Roundworm, hookworm, and whipworm: Treats the three most common canine intestinal worms.

Why Extra-Large-Dog Owners Choose NexGard Spectra

• All-in-one coverage: Replaces 2–3 separate products with one beef-flavored chew.
• Cost-effective for large breeds: Large-dog parasite protection adds up — consolidating into NexGard Spectra typically saves money vs. buying flea/tick + heartworm + wormer separately.
• Easy monthly routine: One chew, same date each month, given like a treat.
• No mess for big dogs: No greasy topical patches on long or thick coats — especially welcome for Mastiffs, Great Pyrenees, and other heavy-coated breeds.
• Properly sized: The Red pack is dosed for 66.2–132 lbs — never split with a smaller dog.

How NexGard Spectra Works

NexGard Spectra uses two complementary active ingredients:

• Afoxolaner kills fleas and ticks systemically when they bite — full-body protection from the inside out, with no topical residue.
• Milbemycin oxime stops immature heartworm larvae from maturing and treats adult intestinal worms (roundworm, hookworm, whipworm).

Who It’s For

• Extra large dogs weighing 66.2–132 lbs (30.1–60 kg)
• Puppies and adult dogs 8 weeks of age and older
• Healthy dogs without a history of seizures (consult your vet if your dog has a seizure history)

How to Give NexGard Spectra

1. Give one Red chew per month, on the same date each month.
2. Offer directly as a treat, or with food.
3. Make sure your dog chews and swallows the full dose.
4. Year-round dosing keeps heartworm protection continuous — missing doses can let larvae mature.

Possible Side Effects

NexGard Spectra is well tolerated by most dogs. Mild, short-lived side effects can include vomiting, diarrhea, itching, lethargy, or reduced appetite. Contact your veterinarian if anything persists.

Product Details

• Brand: NexGard Spectra (Boehringer Ingelheim)
• For: Dogs
• Weight range: 66.2–132 lbs (30.1–60 kg)
• Pack color: Red
• Form: Beef-flavored soft chew (oral)
• Active ingredients: Afoxolaner + Milbemycin oxime
• Minimum age: 8 weeks
• Pack sizes available: 3 Chews or 6 Chews
• Coverage: Fleas, ticks, heartworm, roundworm, hookworm, whipworm

Frequently Asked Questions

My dog is over 132 lbs (a Great Dane or Mastiff) — can I still use NexGard Spectra?
The Red pack is dosed for dogs up to 132 lbs (60 kg). For dogs over that weight, your vet may recommend combining two chews from different size ranges to reach the correct afoxolaner + milbemycin oxime dose. Don’t do this without veterinary guidance — the right combination depends on your dog’s exact weight.

Is this the same NexGard Spectra Red my vet sells?
Yes — it’s the same NexGard Spectra product manufactured by Boehringer Ingelheim, with the same dual active ingredients (afoxolaner + milbemycin oxime) at the same dosages. The only difference is you’re buying it directly from us, over the counter, without a prescription fee.

Does the Red pack cover all the same parasites as the smaller packs?
Yes — every NexGard Spectra pack (Orange through Red) covers the same six parasites: fleas, ticks, heartworm, roundworm, hookworm, and whipworm. Only the dosage per chew changes based on weight band.

Will bathing or swimming reduce effectiveness?
No. Because NexGard Spectra works systemically from inside the bloodstream — not on the skin or coat — bathing, swimming, and rain don’t affect protection. You can dose your dog the same day they swim.

Do I need a prescription to buy NexGard Spectra?
No — SmartWay Pet Supplies ships NexGard Spectra over the counter to customers across the US and Canada. No prescription or vet authorization required at checkout.

Should I dose year-round for a large breed?
Yes — large dogs especially benefit from year-round protection. Heartworm-carrying mosquitoes are active in most US/Canada regions across more months than people realize, and large breeds often spend more time outdoors. Consistent monthly dosing avoids dangerous protection gaps.

Helpful Links

• Shop the full NexGard Spectra range
• NexGard Spectra size guide (lbs ↔ kg chart)

Fast shipping across the US & Canada — no prescription required. Use only as directed on the packaging. Information provided for general reference; speak with your veterinarian for medical advice specific to your dog.