Why are my dogs still itching a week after flea treatment, no fleas?

Thank you for using Petco Pet Education Center, formerly Petcoach! It sounds as if Blitz is becoming re-infested with fleas even after applying appropriate flea preventative measures (i.e. Seresto collar). I would suspect that the environmental control has not yet been adequate to appropriate kill the fleas. I would recommend to my clients to hire a professional parasite control company to perform a treatment for the area (inside and outside). It can take as long as 3 months to adequately control all life stages of the flea life cycle. It is also possible that even though the fleas have been controlled (if you are no longer seeing live adult fleas), that Blitz suffers from a flea allergy. In these cases the itch can last long after the flea is gone. You can continue to bathe Blitz in a soothing shampoo, but if the itch does not resolve it is best to have him seen by his veterinarian to determine what additional anti-pruritic (anti-itch) medication may be needed. It is not uncommon for us to also see secondary bacterial infections (pyoderma) happen due to chronic itching, and a topical medicated shampoo may also be required from his veterinarian.

I would wait another week before adding another flea medication. Also, you need to treat your home environment. If you use a pest control service, tell them you are having a flea problem and they can adjust their treatment. Use a premise spray that also contains an IGR, insect growth regulator. This will keep eggs and larvae from maturing into adults and helps break the life cycle. Also, vacuum EVERY DAY, throwing out the bag or emptying the canister every time into an outside receptacle and spraying the contents with insecticide to kill the fleas you’ve vacuumed up. Treat your yard as well, since fleas are opportunistic and will hop a ride into your home on your pant leg without you knowing it. Concentrate on areas under bushes, in the shade. Fleas are less likely to be located in open sunny areas where it gets hot. If chemicals are a problem for you, you can use borax in your home. Sprinkle it into rugs, into corners and under furniture, use a broom to work it into the fibers and let it sit for hours, days even. It won't hurt you or your cat to have it present. Then vacuum it up, reapply as needed. Food grade diatomaceous earth can be gotten from a health food store and worked into the rugs and corners in the same way as borax. These treatments aren't as fast and effective as chemical insecticides but they can help. You might want to consider boarding your pet for the day at your vet, to give you the opportunity to flea bomb your house without having to worry about your pet being exposed. They can bathe your pet and give a dose of Capstar while you treat your home. Be patient, you may have to repeat these steps multiple times 10-14 days apart to help break the flea life cycle.

Thanks for using Petco Pet Education Center, formerly Petcoach! This is likely due to allergies and until these are improved, he will continue to itch. It really comes down to figuring out what is causing his allergies so that they can be treated or the specific allergen avoided. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!

When you have a heavy flea infestation, you also have to disinfect the environment as well. Wash theirs bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. Dogs who have heavy flea infestations can also develop flea allergies, which would lead them to continue to be itchy and may affect the fur growing back. I would take them both back into the vet, and the vet can discuss if they do have flea allergies and how to treat them. Tonight, give them baths in Epsom salts or oatmeal, as it may help temporarily with the itching. Tomorrow, I'd take them into the vet. Good luck, I hope this helps!

Thanks for using Petco Pet Education Center, formerly Petcoach! I recommend that you try a product called Capstar which can help kill a lot of fleas at once. You can consider switching to another flea preventative product such as Bravecto or Frontline. In the meantime, your veterinarian can consider a medication such as prednisone or Apoquel to help with the itch for now. Good luck!

If you’re noticing increased itching in that area and you found a flea, you may try switching the flea prevention to see if that helps. Fleas can become immune to products. The top products on the market are oral products such as Nexgard and Simparica. Most pets can use these products but you should talk with your veterinarian before switching. They are administered once a month and at this point appear to work very well. If the itching goes away, then you know it was related to flea bites. Best of luck.

Capstar will only kill those fleas that are on the dog and sucking blood once. Getting rid of fleas is relatively easy but entails work for a few months: Unfortunately fleas only hop on the body of your pet when they want to feed, then they hop off again and stay in your pet's environment. So you need to treat all pets in the household as well as the environment (which contains the fleas, their eggs and larvae). Flea treatment:  1) Get some flea medication such as a Flea spray or a spot on from a pet shop or your veterinarian and apply monthly )Bravecto/Nexgard/Seresto will last longer) 2) get flea powder, put some in your vacuum cleaner bag and vacuum your house and furniture and also non-carpeted areas frequently to remove flea larvae and eggs which live off house dust., Dispose of the bag in the trash outside. Hot-wash all the pet's bedding, If you do this diligently for a few months you will get rid of the fleas. Flea products: Spot-ons: Advantage, Advantix Advantage Multi (Advocate in the UK) Frontline (ticks as well) Bravecto/Nexgard spot on (ticks as well) - for cats, in tablet form for dogs Revolution (stronghold in the UK) Tablets: comfortis (will only kill fleas once) Collar: Seresto (ticks as well) House spray: Indoorex Please let me know if you have any other questions or concerns and I would be more than happy to help you further. Please take the time to mark this question as helpful or not as it helps us to improve on the quality of our answers to other pet owners. Thank you so much!