Hartz UltraGuard Dosage For Dogs: Calculator & Safe Guide

Hartz UltraGuard® Dosage Calculator For Dogs By Weight

Ensure safe, accurate protection by matching your dog’s current size and age profile.

It's very important to protect your dog from fleas and ticks for their health, comfort and overall well-being. Hartz UltraGuard Dosage For Dogs Dual Action Flea & Tick Treatment for Dogs is a fast acting topical action flea treatment that eliminates fleas, flea eggs, brown dog ticks and deer ticks (including those that could carry Lyme disease) and helps prevent reinfestation for up to 30 days after each application.

The topical tubes are easy to use, each providing a single dose, which remain on the skin all month, without rubbing off. It disrupts the flea life cycle, preventing infestations from getting a foothold, providing long-lasting relief for pets and pet parents.

The product is formulated for dogs and puppies at least 12 weeks old and is typically available in a range of weights (usually 31-60 lbs or 61-150 lbs depending on the product) so it is important to select the correct dosage to be both safe and effective. Each package contains 3 treatments to be used monthly, giving a 3-month supply of continued protection.

Hartz UltraGuard is a quick-drying formula that will last and offer broad-spectrum protection against parasites keeping your dog comfortable, protected and free from persistent pest problems all month long.

Key Takeaways

Hartz UltraGuard Dual Action is a topical treatment for fleas and ticks that is effective against killing brown dog ticks, deer ticks that can transmit Lyme disease, flea eggs and fleas in dogs.
The single dose tube lasts up to 30 days and controls re-infestation by interrupting the flea life cycle.
The formula is fast acting, quick drying and won't rinse off.
It is appropriate for dogs and puppies 12-weeks of age and older and has weight-based dosage (usually 31-60 lbs or 61-150 lbs, depending on the type of product used).
Usually these packages will come in three monthly applications, which is the ideal 3-month supply.
Dosage according to age and weight is crucial for safety and efficacy.

Hartz UltraGuard Dosage Chart For Dogs By Weight

Here is the complete commercial dosage and tier reference table for Hartz UltraGuard products, converted for both pound (lb) and kilogram (kg) measurements.

Product Line	Retail Package Tier	Weight Range (Pounds)	Weight Range (Kilograms) / Fit	Minimum Age Limit	Administration Protocol
Topical Drops	Toy Dogs	5 to 14 lbs	2.3 to 6.4 kg	12 weeks	Apply entire single vial directly to skin between shoulder blades. Do not split.
Topical Drops	Small Dogs	15 to 30 lbs	6.8 to 13.6 kg	Check box label	Apply entire single vial directly to skin between shoulder blades. Do not split.
Topical Drops	Medium Dogs	31 to 60 lbs	14.1 to 27.2 kg	Check box label	Apply entire single vial directly to skin between shoulder blades. Do not split.
Topical Drops	Large Dogs	61 to 150 lbs	27.7 to 68.0 kg	Check box label	Apply entire single vial directly to skin between shoulder blades. Do not split.
Flea & Tick Collars	Puppies & Small	Not weight-based	Fits necks up to 15 inches	Check box label	Wrap loosely (leave 2-finger gap), buckle, cut and discard excess strip.
Flea & Tick Collars	Large Dogs	Not weight-based	Fits necks up to 26 inches	Check box label	Wrap loosely (leave 2-finger gap), buckle, cut and discard excess strip.
Shampoos & Sprays	Universal	Not weight-based	Based on coat saturation	6 months	Thoroughly wet the coat with water, apply until completely lathered. Avoid eyes/ears.

Critical Safety Constraints
No Estimation: Because concentrations shift non-linearly across box sizes, you must never guess a partial dose or partition a large dog tube for a small dog.
The Cat Barrier: Never apply a package labeled for dogs to a cat. Dog treatments often leverage high permethrin levels that can cause rapid, life-threatening neurological distress in felines.
Border Sizes: For dogs right on a dividing weight baseline (e.g., exactly 14.5 lbs / 6.5 kg), seek professional veterinary confirmation before making a retail choice. Under-dosing fails to clear infestation, while over-dosing compromises margin of safety.

What Are Hartz UltraGuard Products for Fleas and Ticks?

Hartz UltraGuard Dosage For Dogs is a brand of flea and tick control products by the Hartz Mountain Corporation that treats and controls external parasites in both dogs and cats. Formulated to kill adult fleas, flea eggs, flea larvae, ticks (deer and brown dog ticks) and in some cases mosquitoes (depending on the product type), these products are EPA-approved.

Several products are available for both topical (body) and protective (neck) treatments to help guard against and manage parasites. Hartz UltraGuard products include those for both dogs and cats, and they're sorted into four categories: Topical liquids for dogs, topical liquids for cats, collars for dogs and collars for cats.

The different formulas and uses make it crucial to select the proper product to obtain effective parasite protection.

Hartz UltraGuard Topical Liquids for Dogs

The Hartz UltraGuard dose topical liquid products for dogs are monthly (every 30 days) flea and tick treatments that contain active ingredients that include pyriproxyfen (an insect growth regulator that helps control flea populations and prevent reinfestation), etofenprox and more. One product is also supplemented with methoprene for a boost in flea life cycle control.

The company offers three main varieties: Hartz UltraGuard Dual Action, Hartz UltraGuard Plus and Hartz UltraGuard Pro Topical Liquid for Dogs. All varieties will kill fleas, brown dog ticks and deer ticks and, depending on the formula, will kill different parts of the flea's life cycle, including flea eggs and larvae.

Hartz UltraGuard Dual Action kills fleas, ticks and flea eggs and repels them from returning for up to 30 days. Hartz UltraGuard Plus works for the same amount of time, each month, but also kills and repels mosquitoes. Hartz UltraGuard Pro offers the most advanced protection, killing fleas in 15 minutes, killing larvae and ticks, and blocking the hatching of flea eggs and repels mosquitoes for up to 30 days. Additionally, it has a patented pro-glide angled applicator to help with application.

Topical liquid products are all formulated to be used on dogs and puppies 12 weeks of age and over to allow for accurate and safe body weight dosing – 5-14 lbs, 15-30 lbs, 31-60 lbs and 61-150 lbs.

Hartz UltraGuard Collars for Dogs

The Hartz UltraGuard collars for dogs are long-lasting, water resistant and repel parasites on dogs and puppies 12 weeks and older. They are effective against fleas, ticks, flea eggs, larvae and some contain ingredients effective against mosquitoes, and do not require a prescription to purchase. They are typically safe to use as long as they are used according to instructions and there is little risk of overdosing or of interaction.

These collars contain TCVP or methoprene, or in one advanced collar, the synthetic pyrethroid insecticide, deltamethrin, which has been shown to kill fleas and ticks and to repel mosquitoes for up to 6 months.

🔹 Product Types

Hartz UltraGuard Collar (TCVP only)
Collars made up of Hartz UltraGuard Plus (TCVP + methoprene) repellent.
Hartz Ultraguard Pro Collar (TCVP + Methoprene)
Hartz UltraGuard ProMax Collar (deltamethrin + methoprene)

🔹 Protection Offered

Kills fleas, ticks (including deer ticks), flea eggs and flea larvae (depending on formula)
Helps to stop flea eggs from hatching (Plus, Pro, ProMax)
Lasts up to 6 months on mosquitoes (ProMax)

🔹 Duration of Effect

Up to 7 months of flea and tick protection for most collars
Original collar: 5 months tick killing + 2 additional months control
Up to 6-months protection against fleas, ticks and mosquitoes with ProMax collar.

🔹 Sizes & Features

Fits neck sizes up to 15", 20–22", and 26" depending on type
Some versions with reflective strips for enhanced night time visibility (300 to 450 feet)
Can be found in various colors including white, orange, blue and gray
New-fresh scent and water-resistant (for certain models)

🔹 Safety Notes

Can be used on dogs and puppies 12 weeks of age and up
Available without prescription
When used as directed, minimal risk of side effects.
Bed and sleeping areas recommended to be treated as well to increase control of fleas

How Are Hartz UltraGuard Products Used in Pets?

Hartz UltraGuard products are applied to pets monthly by topical application or via long-lasting collars to prevent and control fleas, ticks and other external parasites. Topical liquids are applied directly to the skin every 30 days and collars can last 5 to 7 months, depending on the liquid.

Topical applications need to be applied at the right spot and handled safely for the application to be effective. Treatment is given along the back of the dog starting from the base of the neck down to the tail and the cat is treated at the base of the skull and neck area. Pets should be kept out of the treated area until it is dry so they don't lick or rub it.

The application procedure for cats involves applying the amount appropriate for the cat's weight, removing the cap and breaking the seal, pulling the fur apart and applying the product directly to the skin at the base of the neck. Until dry, the area should not be touched or licked and bathing for 24 hours is prohibited. Repeated treatments every 30 days. Pro formulations: liquid applied in 1 spot at base of neck after skin has been dried; bathing is permitted after 24 hours.

The tube (correct size for weight) is used and the liquid is applied in a straight line from the base of the neck down the spine and to the tail for dogs. Do not wet or bathe the area until dry; do not bathe or allow dogs to swim for 48 hours after applying. Must be reapplied every 30 days. After 48 hours, bathing/swimming is also permitted for Plus/Pro versions.

Collars are easy to use, but need to be fitted correctly. The collar is unpacked, pulled to stimulate it and then fastened around the neck. It should be adjusted to accommodate comfort and growth, particularly for puppies and kittens. An additional 2-3 inches of collar material should be left for adjustments and any excess should be removed and disposed of properly. If properly positioned, the collar should easily slip over the head and stay in place.

Important safety guidelines to follow are to follow all veterinarian instructions, avoid coming into contact with the treated areas until they are dry, and let the veterinarian know if the pet is taking any other medications, supplements, or herbal treatments. It is recommended to consult prior to beginning or ending any treatment.

What Are the Benefits of Hartz UltraGuard Products for Pets?

Hartz UltraGuard products are convenient, over-the-counter flea and tick protection for pets that doesn't require a veterinarian's prescription. The products are formulated for fast and long-lasting protection against external parasites and to make it easier for the pet owner to use.

Hartz UltraGuard collars are effective immediately, killing fleas, ticks, flea eggs, and flea larvae within a short time of being applied. This can help to quickly cut back the invasion of parasites and aid in quicker recovery of pets.

Another benefit is that certain collars for dogs and cats are reflective, which increases visibility and provides an additional layer of safety for outdoor activities particularly in low-light conditions.

Hartz UltraGuard flea and tick collars also offer long lasting protection; up to 5-7 months of continuous protection depending on the product and severity of the infestation. This longer period of time means that reapplication is not needed so often and helps keep parasites away.

Do Hartz UltraGuard Products Have Warnings or Side Effects in Pets?

It is important to use Hartz UltraGuard products carefully, and as directed in the label to keep pets safe. Not for use in animals that are known to be allergic to any of the ingredients and only in pets that are at least as old and as heavy as indicated on the label. Products made for dogs should not be used on cats and vice versa. Special caution should be used in frail, elderly, pregnant, or nursing pets.

Topical liquids should never be applied in such a manner that they can be ingested and pets should not be allowed to lick or groom where the liquid was applied until it is completely dry. Special attention should also be paid to not come in contact with the eyes or mouth of the pet. Other animals should not be allowed to groom the treated area, as this may be attempted by other animals in multi-pet households (particularly cats). If ingested, there may be excessive salivation, foaming at the mouth or abnormal behavior; veterinary attention should be requested immediately.

Side effects are very rare when used as directed but can include redness, itching, and/or irritation at the site of application or collar placement. These should be removed by washing with a mild soap and washing thoroughly with water. If it is too tight, a collar should be loosened right away. Very rarely, particularly when using products containing TCVP, side effects could include vomiting, diarrhea, miosis (small pupils), incoordination, weakness or muscle tremors.

Other precautions are a list of products not suitable for use on cats, a minimum age of 12 weeks for dogs or puppies, and a minimum age of 5 pounds. May cause moderate eye irritation, avoid contact with eyes, skin, or clothing. Hands should be cleaned well after handling or before eating, drinking, and smoking or using any other items.

In case of any serious side effects, overdose symptoms or unusual reactions, immediate veterinary attention is necessary, and emergency animal poison control services should be contacted if needed.

FAQs

Can Hartz UltraGuard products be used alongside other products?

Yes, they can. Let your veterinarian know about any prescription or over-the-counter medications, vitamins, minerals, herbal products or supplements your pet is taking. Never use several products containing TCVP simultaneously and never use within 30 days of cholinesterase-inhibiting drugs, pesticides or other chemicals. Try not to combine products as there may be a greater risk for side effects or irritation if a flea and tick product are used together.

Does Hartz UltraGuard pose any safety risks for pet owners?

Yes. Store all products out of reach of children, and wash hands well after using the product, particularly before eating, drinking, chewing gum, using tobacco or going to the toilet. Do not handle product if allergic to any of its ingredients. When using topical treatments, try not to get it in the eyes, mouth, or on the skin or clothing.

If my pet eats too much, or overdoses, what should I do?

When used properly, overdose is unlikely as Hartz UltraGuard products are generally well tolerated. If you see unusual behavior or suspect an overdose, get in contact with your veterinarian or emergency veterinary clinic right away, though.

If my pet misses a dose, what do I do?

Take the missed dose as soon as possible and resume the monthly regimen from the date of the missed dose. Avoid giving a double dose.

Where does Hartz UltraGuard products need to be stored?

Keep products in the original packaging in a cool, dry location. Do not contaminate food, water or animal feed. Discard used collars and containers properly and never reuse containers because some materials can be toxic to aquatic life.

Is it OK to combine multiple flea and tick products?

No, as a rule it is best to use one flea/tick treatment product at a time. Combining a variety of treatments in one application could result in interactions or greater potential for developing a disease or irritation of the skin. Do not mix products, especially heartworm products, without consulting your veterinarian.

How long will Hartz UltraGuard topical protection last?

When applied as directed, topical treatments usually last for approximately one month.

When do Hartz UltraGuard topicals work?

Applied correctly, they start to kill fleas immediately after application.

Final Thoughts

Hartz UltraGuard products for dogs offer a convenient and easy to use method for helping to protect dogs and cats from fleas, ticks, flea eggs, and flea larvae and some also help protect against mosquitoes. They can be administered as a topical treatment or through a collar, providing versatility to suit various pets, lifestyles, and infestation levels.

If applied correctly and in accordance with the label instructions, these products provide monthly or long-lasting protection to help disrupt the parasite life cycle and minimise the risk of reinfestation. Therefore it is important with proper application, correct dosage for age and weight and no misuse of product for safety and effectiveness.

Precautions, storage and interactions with other medication should be considered as with all parasite control products. Talk to your vet before use, particularly if your pet has any health problems or is already receiving other medications, to ensure that your pet receives safe and proper protection from parasites.