Sergeant’s GUARDIAN® PRO Flea & Tick Collar for Dogs, Fresh Scent

Looking for an effective and affordable way to protect your dog from fleas and ticks for up to 6 months? Slip-on this adjustable dog flea and tick collar.

  • Kills adult fleas and ticks
  • Prevents fleas from developing into biting adults
  • Water resistant, one size fits all dog’s collar
  • For dogs 12 weeks and older
  • No messy applications, won’t wash off
  • Starts working on contact
  • Fresh scent

Sergeant’s®: Affordable Pet Care for Over 150 Years


For use on dogs and puppies 12 weeks of age and older. Do not use on animals other than dogs as shown on product package.

Do not open package until ready to use. Do not let children play with collar. Dust may form on collar during storage. Do not get dust in mouth or eyes. Use only one collar per dog at a time.

Read the entire label carefully before using any product on your dog. For additional help or more information, our social care team is available to answer your questions Mon-Friday, 8am to 4pm CST. Or you can call us at 1-800-224-7387.

How to Apply:

  1. Unroll the collar
  2. Place the collar around dog’s neck. Adjust for fit, and buckle in place. Maximum effectiveness may not occur for 2-3 weeks after collar placement. The collar must be worn loosely to allow for growth of the dog and to permit the collar to move about the neck.
  3. Any excess length of the collar beyond 2-3 inches should be cut off, wrapped in newspaper and placed in the trash.
  4. Wash hands after placing collar on dog.

Hazards/Warning Statements

Hazards to Humans:
Do not open protective package until ready to use. Do not let children play with this collar. Harmful if swallowed or absorbed through skin. Causes moderate eye irritation. Avoid contact with skin, eyes, or clothing. Wash thoroughly with soap and water after handling. This collar is for use only as an insecticide and is not to be taken internally by humans or animals.

Hazards to Domestic Animals:
Do not use it for puppies under 12 weeks. Do not use it for cats. Consult a veterinarian before using this product on debilitated, aged, pregnant, medicated, or nursing dogs. Sensitivities may occur after using ANY pesticide products for dogs. If signs of sensitivity occur, remove the collar and bathe your dog with mild soap and rinse with large amounts of water. If signs continue, consult a veterinarian immediately.

First Aid

If swallowed:

  • Call a poison control center or doctor immediately for treatment advice. Have person sip a glass of water if able to swallow.  Do not induce vomiting unless told to do so by the poison control center or doctor.  Do not give anything by mouth to an unconscious person.

If on skin or clothing:

  • Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes.  Call a poison control center or doctor for treatment advice.

If in eyes:

  • Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eyes.  Call a poison control center or doctor for treatment advice.

Have the product container or label with you when calling a poison control center or doctor or going for treatment. You may also call 1-877-416-7330 for emergency medical treatment information.

Storage/Disposal of product

We recommend storing the product in a cool, dry place inaccessible to children and pets. Do not refrigerate or store in direct sunlight.

Do not reuse container or used collar. Dispose of in trash.


What are the benefits of using this product?

Kills through contact so fleas don’t have to bite to die
Water resistant

What is the difference between this product and oral flea products?
This product is applied to your pet around the neck and kills fleas through contact with the product on your pet’s skin, so fleas don’t have to bite to die. With oral flea medications, fleas must bite your furry family member and be exposed to the medication in the pet before the fleas are killed.

Can I apply a flea & tick squeeze-on to my dog after I have applied the collar?
No. This will put your pet at risk of an overdose of flea/tick product.

Can you use oral flea & tick medications with this collar?
No. This will put your pet at risk of an overdose of flea/tick product.

How do these products spread over a pet’s body? How long does this take?
The collar uses sustained release technology by releasing the active ingredient at a steady rate for up to 6 months. The dog’s natural oils help to distribute the product through your dog’s skin and coat providing full body protection. It should start working soon after application, but maximum effectiveness may not occur for 2 to 3 weeks after placement.

How does this product work?
This product combines two active ingredients:

Deltamethrin attacks the flea’s nervous system – paralyzing and ultimately killing it.
Pyriproxyfen is an insect growth regulator (IGR) that prevents flea eggs and larvae from maturing to adults

This combination plays a crucial role in existing infestations, because:

In an existing infestation you might only be aware of the adult fleas, which only represent around 5% of the full infestation and are found on your furry family members.
Immature flea life stages (flea eggs, larvae and pupae) which live in your furry family member’s environment consist of around 95% of the infestation and can be almost invisible to the naked eye.