Sentry Cat Deals

Best Mother's Day Gifts for Cat Moms: Petco's Purr-fect Picks

Have a cat mom in your life, or is your mom also an avid cat fan? Explore these favorites on Mother's Day.

Updated on October 23rd, 2025

Find the Perfect Cat Name: Popular & Unique Ideas for Your Feline

Are you looking for the perfect male or female cat name? Petco’s list of cat names can help you choose the best one for your cat!

Updated on October 23rd, 2025

Best Holiday Cat Gifts: Treats & Toys Picky Felines Can't Resist

Spoil your cat this holiday season with our favorite treats and toys, perfect for keeping them entertained and happy during the festivities.

Updated on October 23rd, 2025

Your Cat's Best Life: Feeding, Health, Behavior & Home Guide

Learn how to care for your cat, recommended diet and grooming care. Find the right food, supplies and equipment at your neighborhood Petco.

Updated on October 23rd, 2025

Affordable Pet Insurance: Shield Your Pet from High Vet Bills

Prepare for unexpected issues with your pet by looking into the benefits of pet insurance and comparing Petco Insurance plans.

Updated on October 23rd, 2025

My cat has fleas, Sentry failed. What's a fast, safe flea treatment?

Over the counter Hartz and Sentry products do not work. I suggest you get prescription strength flea medications. You can easily get these medications from one of our VETCO clinics inside Petco stores. Here are the ones in your area: ( https://www.vetcoclinics.com/services-and-clinics/clinic-locations-and-schedules/?zip=77081 ) Take the cats with you. It is first come, first serve and there is no exam fee so just the cost of the products. The vet there can advise you when you can give the new product based on when you applied the other product. You also need to treat your house and yard (if you have one for fleas). I suggest these products: ( https://www.allivet.com/p-1389-knockout-es-area-treatment.aspx ) ( https://www.allivet.com/p-9065-vet-kem-yard-spray-32-oz.aspx?SearchTerm=yard%20spray+Auto ) Hope this helps. Best wishes.

My cat scratches, pulls fur after Sentry flea drops. What can I do?

Hello, thank you for using Boop by Petco. He is probably having a reaction to the Sentry. This is not the best product and I strongly recommend you stay away from using it. This product is known to have a high rate of reactions. If you are looking for an over the counter product I would use [Advantage II](https://www.petco.com/shop/en/petcostore/product/advantage-ii-once-a-month-cat-and-kitten-topical-flea-treatment-over-9-lbs) but honestly, when a cat has other underlying health issues it is best to consult with your vet as to what the best product would be to use for him. At this point in time, the best thing to do is to bathe him in Dawn dish soap in an attempt to remove any residue from the Sentry and then wait two weeks before applying a different product. Hope this helps. Best wishes.

What's cheap flea & tick control for feral cats I can't handle?

You may benefit from contacting the company directly and asking for coupons or free samples. You might consider giving your local SPCA or discount clinic a call as well. They may know more about discounted options in your area.

Need flea treatment for multiple cats? What's best to buy online?

If it is available, my best topical flea treatment for cats is Cheristin. It is very effective and kills fleas before they bite, which is helpful for cats with flea allergies since it is the bite they react to. Comfortis is a tablet that is also very effective, but it can cause vomiting.

Can I give my cat Capstar for fleas after Sentry topical treatment?

Yes, you can give Aries Capstar in addition to the topical Sentry medication. Be sure to continue applying topical flea prevention monthly in order to break the flea lifecycle. When he is due for the next dose of medication, I would recommend using a higher quality (both safer and more effective) flea preventative, such as Advantage, Revolution, or Bravecto. If you have any other dogs or cats in the house, be sure to treat all pets with good quality flea prevention. I hope this helps and that all goes well!