Multiple studies have found Seresto collars to be safe for pets and their owners. See sources here and here. Collars purchased from Pets in Harmony Veterinary Hospital, another licensed veterinary hospital, or a licensed pharmacy are safe to use on your pet.

Needed after Sir esto is placed on the dog or cat fleas are killed within 24 hours and ticks within 48 hours as the active ingredients wear off the dog or cat over time sir esto continuously

If your pet has been using a Seresto collar without incident, it is highly unlikely that your pet will develop an issue and, in our experience with this product, we believe that you can continue to safely use Seresto collars. We've had many staff and clients using this collar over many years without any major issues.

Even when pets ingest the collars - which happens fairly often with dogs - she said, “the toxicity of these collars is extremely low, and they have no 'red flags' on this particular product.”

In its human health risk assessment, EPA determined that the collars may cause slight skin irritation but will not cause skin allergies.

Seresto® kills existing fleas within 24 hours of applying the collar. New adult fleas are killed within 2 hours for the next 8 months. However, immature fleas can still develop in the environment for six weeks or more.

Photo by James Gathany. In its human health risk assessment, EPA determined that the collars may cause slight skin irritation but will not cause skin allergies.

Results. Acaricidal efficacy for in situ counts was 93% on Day 30, and ranged from 97 to 100% thereafter. No B. canis specific DNA or antibodies were detected in any Seresto®-treated dog at any time.

However, some pet owners have pointed to the collars as the reason their dogs have suffered from lethargy, loss of motor functions, skin problems, and seizures. "My takeaway is that it should be looked into," says Elizabeth Trepp, DVM.

You can still pet your dog and let him on furniture. Just don't lick the collar and you will be fine. Don't worry, as other people have said you'll be fine. Just don't put the collar on and wear it around for a while.

2. Avoid contact with eyes, skin or clothing. 3. Wash hands thoroughly with soap and cold water after fitting the collar.

Seresto Vet-Recommended Flea Collar for Cats – Best Overall The powerful formula starts working within just 24 hours to kill and repel fleas by contact. No more worrying about your furry friend getting bitten and suffering from the discomfort and diseases that come with flea and tick infestations.