Word got around to the manufacturer but it was a mystery why Onyx died.
![](http://www.relayhero.com/wp-content/uploads/2017/06/cat-flea-collar.png.webp)
Image Credit: Boredom Therapy
Flea collars have been known to cause hair loss and skin problems to pets.
![](https://www.relayhero.com/wp-content/uploads/2017/06/cat-collar-burn.png.webp)
Image Credit: Boredom Therapy
Like this poor cat here, the collar caused a serious chemical burn.
![](https://www.relayhero.com/wp-content/uploads/2017/06/Fleacontrol.jpg.webp)
Image Credit: Boredom Therapy
Please seek your vet’s advice before purchasing a flea collar!
![](https://www.relayhero.com/wp-content/uploads/2017/06/onyx-memorial.png.webp)
Image Credit: Boredom Therapy
Share away, people.