Robert from North Scituate, R.i. writes
I forgot when I bought it
Unfortunately there really is not a way to visually tell when the Seresto Dog Flea and Tick Collar needs to be replaced. If you cannot remeber when the collar was purchased, we recommend replacing it. You can keep your purchase receipt in a safe place or mark the date on the packaging as a helpful reminder on when to replace it.
Answer last updated on: 07/19/2019