Abi from Crediton writes
Do I need to take it off for my dog to swim in rivers, will it harm water wildlife?
Seresto Dog Flea and Tick Collar is not harmful to wildlife when used as directed. Under normal conditions, effectiveness lasts for eight months. In order to maintain an 8-month duration, dogs must not be bathed more than once per month. For dogs that swim once a month or more, the control duration is reduced to five months.
Answer last updated on: 07/22/2019