Best Hartz Dog Flea Drops in 2025

Daisy
Last Updated: Nov 2, 2025

At a Glance: Our Top Picks for Hartz Dog Flea Drops

Hartz UltraGuard Pro Topical Flea & Tick Prevention for Dogs and Puppies, 15-30 lbs 6 Monthly Treatments
#TOP1
Hartz Ultraguard Pro Topical Flea & Tick Prevention
9.6
PM SCORE
Hartz UltraGuard Pro Flea Tick Drops for Dogs 3160 lbs
#TOP2
Hartz Ultraguard Pro Flea Tick Drops For Dogs
9.6
PM SCORE
Hartz UltraGuard Rid Worm Liquid for Cats 4 oz
#TOP3
Hartz Ultraguard Rid Worm Liquid For Cats 4
9.6
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Hartz Dog Flea Drops of 2025

Market Overview
Hartz Dog Flea Drops Reviewed
  • Reviews Analyzed: 29292 Items
  • PM Avg. Rating: 7.6 / 10
20 Products Evaluated
  • Highest Price: $75.98
  • Lowest Price: $7.53
  • Avg. Price: $23.34

Hartz Ultraguard Pro Topical Flea & Tick Prevention For Dogs And Puppies, 15-30 Lbs 6 Monthly Treatments

HARTZ
032700112769
1.96 X 6.20 X 4.67 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

KILLS FLEAS & TICKS AND REPELS MOSQUITOES: Kills fleas, flea eggs, flea larvae, deer ticks and brown dog ticks on contact and repels mosquitoes before they bite

PREVENT RE-INFESTATION: Long-lasting monthly topical flea treatment that prevents re-infestations for 1 month with dual Insect Growth Regulators (IGRs) that protect your pet and their environment

FAST ACTING FULL BODY PROTECTION: Safe yet powerful formula spreads across the skin using your dog's natural oil to quickly travel across the coat for full body protection from head to tail

EASY TO APPLY: Features the patented and easy-to-use Pro-Glide angled applicator with rounded edges for a softer more pleasant application experience suitable for long and short-hairded dogs

6 MONTHLY FLEA & TICK TREATMENTS: Contains 6 single dose tubes (1 tube per monthly application) for non-stop protection for up tp 6 months

Hartz Ultraguard Pro Flea Tick Drops For Dogs 3160 Lbs

HARTZ
HRZ-180
12.13 X 8.38 X 7.63 Inches
0.05 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
EntirelyPets 9.89

Features

The patented and easy-to-use Pro-Glide angled applicator with rounded edges easily gets through dog's fur, for gentle on-skin application. Suitable for long and short-haired dogs

Includes 3 monthly treatments in easy to apply, single dose tubes

Topical drop formula kills fleas, flea eggs, flea larvae, brown dog and deer ticks, prevents re-infestation, plus repels mosquitoes for 30 days

Starts killing fleas within 15 minutes

For use on dogs and puppies 12 weeks or older that weigh 31-60 pounds

Hartz Ultraguard Rid Worm Liquid For Cats 4 Oz

HARTZ
3270014108
1.88 X 1.88 X 5.40 Inches
0.35 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

A mild and effective method to remove roundworms (Toxocara Canis and Toxacaris Leonia) from cats and kittens.

Includes 4 ounces of dewormer syrup

For use on cats and kittens 8 weeks of age and older

Easy-to-use syrup can be dropped directly into your pet's mouth or mixed into food.

The first treatment should be repeated 14 days later

Store product in a cool, dry place and avoid temperatures above 86°F

Hartz Ultraguard Dual Action Topical Flea & Tick Treatment For Dogs And Puppies - 15-30Lbs, 3 Monthly Treatments

HARTZ
03270015651
0.58 X 3.75 X 6.69 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Beachfront Dreams 9.95

Features

Fast-acting topical drop formula kills fleas, flea eggs, deer and brown dog ticks, plus prevents re-infestation for 30 days

Includes 3 monthly treatments in easy to apply, single dose tubes

This product also kills deer ticks, which may carry Lyme disease

For use on dogs and puppies 12 weeks or older that weigh 15-30 pounds

Apply at the base of the pet's back between the shoulder blades

Hartz Ultraguard Dual Action Flea & Tick Topical Dog Treatment And Flea And Tick Prevention, 3 Months, 5-14 Pound Dogs(Pack Of 3)

HARTZ
3270015648
0.58 X 3.75 X 6.69 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Abdul and Jesi's 5.29

Features

Fast-acting topical drop formula kills fleas, flea eggs, deer and brown dog ticks, plus prevents re-infestation for 30 days

Includes 3 monthly treatments in easy to apply, single dose tubes

This product also kills deer ticks, which may carry Lyme disease

For use on dogs and puppies 12 weeks or older that weigh 5-14 pounds

Apply at the base of the pet's back between the shoulder blades

Hartz Ultraguard Dual Action Topical Flea & Tick Treatment For Dogs And Puppies - 31-60Lbs, 3 Monthly Treatments

HARTZ
3270015650
0.88 X 4.25 X 6.69 Inches
0.03 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
1EIGHTY-SEVEN, LLC 5.33

Features

Fast-acting topical drop formula kills fleas, flea eggs, deer and brown dog ticks, plus prevents re-infestation for 30 days

Includes 3 monthly treatments in easy to apply, single dose tubes

This product also kills deer ticks, which may carry Lyme disease

For use on dogs and puppies 12 weeks or older that weigh 31-60 pounds

Apply at the base of the pet's back between the shoulder blades

Hartz Mountainhotspot Medication F/Dogs12791

HARTZ
2724471859865
5.50 X 2.10 X 1.20 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Galactic Shop 9.98

Features

HARTZ MOUNTAINHOTSPOT MEDICATION F/DOGS12791

HARTZ MOUNTAINHOTSPOT MEDICATION

Hartz Ultraguard Dual Action Flea & Tick Topical Dog Treatment And Flea And Tick Prevention, 6 Months, 60+ Pound Dogs

HARTZ
032700120429
0.88 X 4.88 X 6.69 Inches
0.04 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

KILLS FLEAS & TICKS: Kills fleas, flea eggs, deer ticks, and brown dog ticks on contact – it is important for your pup to have a flea and tick prevention treatment all year round!

PREVENTS RE-INFESTATION: This topical formula prevents re-infestation by breaking the flea life cycle for up to 30 days.

FAST ACTING FULL BODY PROTECTION: Active ingredients spread across the skin using your dog’s natural oil to quickly travel across the coat for full body protection from head to tail.

6 MONTHLY FLEA & TICK TREATMENTS: Contains 6 single dose tubes (1 tube per monthly application) for non-stop protection for up to 6 months. Apply at the base of your dog’s back between the shoulder blades each month.

Hartz Ultraguard Pro Topical Flea & Tick Prevention For Dogs And Puppies - 15-30 Lbs, 3 Monthly Treatments

HARTZ
03270010875
12.13 X 8.38 X 7.63 Inches
0.05 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PrimeLoop 7.01

Features

The patented and easy-to-use Pro-Glide angled applicator with rounded edges easily gets through dog's fur, for gentle on-skin application. Suitable for long and short-haired dogs

Includes 3 monthly treatments in easy to apply, single dose tubes

Topical drop formula kills fleas, flea eggs, flea larvae, brown dog and deer ticks, prevents re-infestation, plus repels mosquitoes for 30 days

Starts killing fleas within 15 minutes

For use on dogs and puppies 12 weeks or older that weigh 15-30 pounds

Hartz Ultraguard Pro Topical Flea & Tick Prevention For Dogs And Puppies - 5-14 Lbs, 3 Monthly Treatments

HARTZ
03270010874
12.13 X 8.38 X 7.63 Inches
0.05 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Jason in Max 6.65

Features

The patented and easy-to-use Pro-Glide angled applicator with rounded edges easily gets through dog's fur, for gentle on-skin application. Suitable for long and short-haired dogs

Includes 3 monthly treatments in easy to apply, single dose tubes

Topical drop formula kills fleas, flea eggs, flea larvae, brown dog and deer ticks, prevents re-infestation, plus repels mosquitoes for 30 days

Starts killing fleas within 15 minutes

For use on dogs and puppies 12 weeks or older that weigh 5-14 pounds

Hartz Ultraguard Flea & Tick Drops For Dogs & Puppies 31-60Lbs - 3 Monthly Treatment

HARTZ
3270096218
4.90 X 7.00 X 0.40 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Hearthshire 9.96

Features

Only for dogs and puppies 12 weeks and older weighing 31-60 lbs

3 Monthly Treatments

Rapidly eliminates fleas

Lasts for 30 days

#TOP12

Hartz Ultraguard Plus Topical Flea & Tick Prevention For Dogs And Puppies - 15-30 Lbs, 3 Monthly Treatments

HARTZ
3270098207
4.00 X 4.00 X 1.00 Inches
0.07 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

The patented Pro-cision Flo applicator easily penetrates short and long fur for application directly to your dog’s skin

Includes 3 monthly treatments in easy to apply, single dose tubes

Fast-acting topical drop formula kills fleas, flea eggs, deer ticks and brown dog ticks, plus repels mosquitos for 30 days

Contains both an adulticide to kill adult fleas, ticks and mosquitoes and an insect growth regulator (IGR) to kill flea eggs before they hatch

For use on adult dogs and puppies 12 weeks of age and older

Monthly treatment kills and repels fleas and ticks for up to 30 days

Kills mosquitoes, plus kills and prevents flea eggs

Use only on dogs over 12 weeks of age

Do not use on cats or kittens

Package contains 3 monthly treatments

Hartz Ultraguard Dual Action Topical Flea & Tick Treatment For Dogs And Puppies - 61-150Lbs, 3 Monthly Treatments

HARTZ
03270015651
0.88 X 4.25 X 6.69 Inches
0.04 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Proficient Supply INC 9.91

Features

Fast-acting topical drop formula kills fleas, flea eggs, deer and brown dog ticks, plus prevents re-infestation for 30 days

Includes 3 monthly treatments in easy to apply, single dose tubes

This product also kills deer ticks, which may carry Lyme disease

For use on dogs and puppies 12 weeks or older that weigh 61-150 pounds

Apply at the base of the pet's back between the shoulder blades

#TOP14

Hartz - Ultraguard Onespot - Cat

HARTZ
3270001915
15.62 X 9.63 X 7.50 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Galactic Shop 9.98

Features

Hartz advanced care brand once a month flea tick drops for cats and kittens weighing 10 lbs or less.

Hartz Ultraguard Plus Drops For Cats, Over 5-Pound

HARTZ
3270010844
1.00 X 3.70 X 5.90 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Only for cats and kittens 12 weeks and older weighing 5lbs and over

3 Monthly Treatments

Rapidly eliminates fleas

Lasts for 30 days

Kills fleas ticks and flea eggs

Kills and repels mosquitoes

Prevents re-infestation for up to 30 days

3-Monthly treatments

Ultraguard Flea And Tick Treatment Drops For Dogs And Puppies

HARTZ
03270097836
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
HealthandOutdoors 9.62

Features

KILLS

Fleas

Ticks

Mosquitoes

Ultrasonic, Natural, Chemical-Free Tick And Flea Repeller - Flea And Tick Treatment For Dogs - Ultrasonic Flea And Tick Repeller For Dogs And Cats

ALWAYS88
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
VoMinhHan 5.10

Features

- Advanced Technology: The sound wave produced by the device has a frequency range of 19.5-135 kHz and can cover an area of around 64 square feet.

- Safe for Humans and Pets: The device emits a high-frequency sound that can safeguard your pet and their sleeping areas from pests in a manner that is completely safe, odor-free, and free of any harmful chemicals.

- Rechargeable: This innovative device comes with a Rechargeable battery that lasts approximately six months.

- Easy to use: The device is small, lightweight, and can be easily attached to your pet's collar, making it a stylish and convenient choice for pet owners who value conscientiousness.

- Portable Design: With its portability and ability to work on dogs and cats of all sizes, you can take this tool with you wherever you go. Its EPA Registration Number is 101385-CHN-1.

K9 Advantix Ii Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 Lbs. | 6-Mo Supply

K9 ADVANTIX
86315122
7.90 X 5.00 X 2.30 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Fannys Gifts 9.57

Features

K9 Advantix II Medium Dog 30-day treatment & prevention protects dogs 11-20 lbs. from fleas, ticks, mosquitoes, biting flies and lice

Kills fleas within 12 hours of application

Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die

Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours

No prescription needed

K9 Advantix Ii Xl Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 Lbs. | 6-Mo Supply

K9 ADVANTIX
86315068
7.75 X 1.00 X 4.25 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Dynamic Duo Distribution 9.86

Features

K9 Advantix II Extra Large Dog 30-day treatment & prevention protects dogs over 55 lbs. from fleas, ticks, mosquitoes, biting flies and lice

Kills fleas within 12 hours of application

Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die

Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours

No prescription needed

K9 Advantix Ii Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21 - 55 Lbs. | 6-Mo Supply

K9 ADVANTIX
86315092
7.75 X 1.00 X 4.25 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

K9 Advantix II Large Dog 30-day treatment & prevention protects dogs 21-55 lbs. from fleas, ticks, mosquitoes, biting flies and lice

Kills fleas within 12 hours of application

Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die

Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours

No prescription needed

Top 10 dog flea drops hartz Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Hartz 16
K9 Advantix 3
Always88 1

Top 10 dog flea drops hartz Brands Pie Chart


We've carried out a comprehensive analysis of 29,292 reviews on dog flea drops hartz, using our selection criteria to identify the best options in the dog supplies. Our findings reveal that most customers typically select dog flea drops hartz priced around $23.34, with top brands including k9 advantix, hartz, seresto, tevrapet, advantus, wondercide, capstar and beloved pets and always88

Our team of expert editors reviewed these high-quality items and handpicked the top 20 dog flea drops hartz for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the dog supplies category. These include dynamic duo distribution, amazon.com, fannys gifts, hearthshire, healthandoutdoors, entirelypets, jason in max, primeloop and tevrabrands and wondercide .

We are dedicated to assisting our users in finding the right drops Products based on their needs, saving them considerable time when choosing which dog flea drops hartz to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.