Jessy Edwards  |  August 30, 2021

Category: Legal News

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seresto collar
(Photo Credit: Cristian Storto/Shutterstock)

Seresto Flea Collar Class Action Lawsuit Overview:

  • Who: A Florida consumer, John Czerniak, sued Bayer and Elanco Animal Health Inc., the former and current owners of the Seresto brand of flea and tick collars.
  • Why: The lawsuit stems from allegations that the Seresto collars can sicken and kill pets.
  • Where: Czerniak’s lawsuit is playing out in federal court in Pennsylvania.

At least one of the class action lawsuits claiming owners of the Seresto brand flea and tick collar knowingly sold a product that can sicken and kill pets is progressing through the courts.

On Friday, a class action complaint filed by Florida Plaintiff John Czerniak against Seresto’s former owner Bayer and its new owner Elanco Animal Health Inc. was transferred to an Illinois court for pretrial proceedings.

Czerniak filed the lawsuit in April, alleging his dog Romeo developed seizures and skin irritation while using the Seresto collar, and that the seizures only stopped when he removed the product. 

Czerniak’s class action lawsuit is purely seeking economic damages for the Class, rather than relief for any personal injuries or wrongful death, Law360 reported.

His is one of at least three class action lawsuits filed regarding the Seresto collar, after a bombshell report on the Seresto flea and tick collar by USA TODAY and the Midwest Center for Investigative Reporting

Journalists discovered that, since Seresto collars were introduced in 2012, the U.S. Environmental Protection Agency (EPA) has received incident reports of at least 1,698 pet deaths related to the product and done nothing about it.

Since the report was released, a Congressional subcommittee called on Elanco to voluntarily recall the flea and tick collars, but the company declined to do so, saying there was no evidence that the collar was to blame for the animals’ deaths.

Since the Seresto collar hit the market in 2012, the EPA received more than 75,000 incident reports related to the collars, including the 1,698 pet deaths and nearly 1,000 involving human harm.

Between 2013 and 2018, 907 incidents were reported with humans, 19 of these incidents deemed severe. 

One included a case of a 12-year-old boy who slept in a bed with a dog wearing a collar who started having seizures and vomiting and had to be hospitalized. 

The collar was developed by German pharmaceutical company Bayer and sold to Elanco in 2020. Elanco spokesperson Colleen Dekker said the company had sold more than 25 million collars and an incident report rate of .3 percent, and it had investigated all the reports of death and found no link to the active pesticides, USA Today reported.

“There’s nothing that suggests it’s the active ingredients in the collar that’s at fault,” Dekker reportedly said.

In March, weeks after the first report of incidents surrounding the Seresto collar, a class action lawsuit was filed against Elanco alleging the company misrepresented the safety of its products.

In May, another lawsuit against Bayer Corp and Elanco was filed in a Pennsylvania federal court, claiming the pair sold the Seresto flea collar despite knowing that substances included in the product could harm pets and owners.  

Have you used a Seresto flea collar on your pet? We want to hear from you! Tell us what happened in the comment section below.  

The lead plaintiff is represented by Daniel C. Levin, Nicholas J. Elia of Levin Sedran & Berman LLP, and Scott D. Levensten Law Firm, PC.  

The Seresto Flea Collar Class Action Lawsuit is Levensten v. Elanco Animal Health Incorporated, et al., Case No. 2:21-cv-02364 in the U.S. District Court for the Eastern District of Pennsylvania.


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176 thoughts onClass Action Alleging Seresto Collar Can Kill Pets Advances to Next Stage

  1. Pet owner says:

    I’m in a facebook group for pet owners. Some people are already in contact with law firms about appealing this case. Not enough money is being offered for people who lost a pet. The original company that made these were bought out. The new company is the one that settled the case.

  2. Christine Jones says:

    I have used these collars since they came out my cat got lung cancer and died 1-12 of 23 he suffered then Rosie 12-08-23 at 8:08 pm and 3 weeks to the Day My dog Missy she was 11 and died 12-29 the day after my 65 th birthday she got
    Lymphoma and her kidneys shut down down so she died from renal failure from lymphoma which came from the flea collar and I want to sue because I’ve lost two animals in in three weeks and three in less than a year all wearing Cresto the other three don’t wear those collars, because two are Yorkies and ones the schnauzer.

    1. Christine Jones says:

      Now its my Schnauzer! I took him into vet today for a wellness check up now a heart murmor and they think he has cancer Its 5 days since Missy passed & now this

  3. Lisa Jennings says:

    My Name is Lisa Jennings, I live in Kentucky I was told about the collar by a person whom worked at. Calhoun Pets .I had a chiweenie , and so I bought one of the Seresto collars. It did not turn out good we made sure that the collar was not tight on him done everything we was supposed to, one night we was going to bed he was at the end of the bed scratching really bad and he was winning I go ask him what’s wrong, there was blood all over the bed covers, so I was looking to see where it was coming from it was his neck he had it on for only about 2 weeks . I TOOK HIM TO THE VET HE HAD TO HAVE SURGERY ON HIS NECK He was never right after that with his skin .HE LATER DEVELOPED HEART PROBLEMS and I lost my sweet boy june 12th 2023 . Don’t tell me it wasn’t that collar because it was because he never had any problems until that. They should pay for what they have done that’s cruelty to Animals in my book…

  4. John Gostan says:

    My 1`1 year old healthy, country living dog developed Lymphoma and died while using a Seresto collar. Our other dog showed early signs of illness, scratching… so we took it off her and went to a chewable flea and tick remedy.

    1. Christina Birtell says:

      Bought seresto flea collars for both my dogs. After wearing them for a few months, noticed my black lab now has tumors growing on the back of his neck. I looked up further information on the dangers of Seresto collars and immediately removed them from both my dogs. Now, I am not only concerned for the health of my dogs, but also for the expense it will detail as well as the health of my family. I have 2 children.

  5. Michelle Lucas says:

    Within the last two years I have lost two of my four legged family members, both wore the seresto collars. My world was and has been shattered and upside down without them both since then. Macy was a service dog for my daughter she had never been sick and shortly after wearing the collar she got very sick began vomiting constantly and her stomach then twisted from all the perfuse vomiting she passed away at the vet hospital. She was 8 years old. My chihuahua was 5 and began having seizures and heart palpitations after the removal of his seresto collar. My life will never be the same. I wised more than anything I’d had heard about this sooner. People I pray you never have to go thru anything like this please don’t use these collars for your four legged family members! I pray for all these families involved with or that have experienced anything like this from using seresto collars. We are caring loving parents (pet parents) we’re lead to believe that the seresto collars were going to help our babies but have found out just what he opposite. My family prays this never happens to any more families ever. No amount of money can or will ever bring my babies back again.

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