Rick from Cherokee writes
There really is no need to use an essential oil flea spray when using Seresto Dog Flea and Tick Collar but would recommend consulting with your Vet prior to using an essential oil with the Seresto Collar or contacting the manufacturer of Seresto directly. Seresto is made by Elanco Animal Health. They can be reached directly at 877-352-6261,
Answer last updated on: 07/29/2022