Questions? Call 877-813-7387 Mon-Fri 8am - 5pm CT
Click for details
Click for details
close ×

Save 5% With Autoship

Autoship is an easy way for items to be automatically delivered on a regular schedule. Autoship is easily managed online and can be canceled at anytime. Simply choose how often you want to receive your items, and it will be automatically delivered to your doorstep. A 5% discount is applied to all autoship orders. Shipping is included on orders over $69.
An email reminder is sent 3 days before the autoship is scheduled for shipment. Order frequency, next order date and/or quantity can be changed in the 'autoship' section in your account. Changes to orders may be made anytime within 24 hours of the next scheduled order date.

See all Autoship details »
close ×

Holiday Closing / Shipping Hours

There will be no shipping on the following days due to Pet Supplies 4 Less offices holiday closings and our shipping carriers’ holiday schedules.

Thursday, Nov. 28: PSL offices are closed as well as all carriers.
Wedsday, Dec 4: No shipping due to inventory system updates.
Thursday, Dec. 5: No shipping due to inventory system updates.
Friday, Dec 6: No shipping due to inventory system updates.
Tuesday, Dec. 24: PSL offices close at noon CT.
Wednesday, Dec. 25: PSL offices are closed as well as all carriers.
Wednesday, Jan. 1: PSL offices are closed as well as all carriers.

Last Day to Order to Receive Packages Before Christmas Day
Standard Ground Shipping: Wednesday, Dec. 18, 2019
2-Day Shipping: Wednesday, Dec. 18, 2019
Overnight Shipping: Thursday, Dec. 19, 2019

Pet Supplies 4 Less is not responsible for lost, stolen or misdelivered packages. Delivery by Christmas is not guaranteed as deliveries may be delayed due to weather or other in-transit issues.

See all shipping details »

Sentinel Spectrum Rx

Sentinel Spectrum Rx
Part Number:28903|


Novartis Animal Health
  • For management and prevention of fleas, heartworm and intestinal worms
  • Safe for dogs six weeks of age and older
  • Formulated with milbemycin oxime, praziquantel and lufenuron
  • Delicious, beef-flavored chew for monthly treatment

Your Price: $7.99
In Stock

Choose Options

Weight / Count / Size
2-8lbs / 1
8-25lbs / 1
25.1-50 lbs / 1 ct
50.1-100 lbs / 1 ct
2-8 lbs, 6 chewables, Orange
8.1-25 lbs, 6 chewables, Green
25.1-50 lbs, 6 chewables, Yellow
50.1-100 lbs, 6 chewables, Blue
Free Shipping
You need to be a registered customer to order this product. Please Login to your account or click here to Register.

Save 5% and have this product automatically shipped to you!

Sentinel® Spectrum

For optimal parasite protection, Sentinel® Spectrum is formulated with three active ingredients that control and prevent fleas, heartworm and intestinal worms in dogs. These three active ingredients include Milbemycin oxime, praziquantel and lufenuron.

Milbemycine oxime prevents nerve transmission in invertebrates, which protects against heartworm, round worm, hookworm and whipworm. Praziquantel inflicts a muscle spasm in tapeworm, which is then attacked by enzymes and then disintegrated. Lufenuron regulates insect growth and disrupts the flea breeding cycle. Adult fleas that feed on an animal that has taken Sentinel Spectrum will produce eggs or larvae that do not make it to the adult stage, thus reducing the number of fleas.

A monthly, beef-flavored chew is an easy way to keep your pet healthy and parasite-free while also giving your pup a delicious reward.

All prescription items are NON-REFUNDABLE and NON-RETURNABLE.

CA Prop 65 WarningThis product contains chemicals including, Butylated Hydroxyanisole (BHA), which is known to the State of California to cause cancer, birth defects or other reproductive harm. (California law requires this warning to be given to customers in the state of California) For more information go to