It must be overhauled.” Seresto collars are plastic bands impregnated with insecticides that are released over time and coat an animal’s fur. The active ingredients of the flea collar are imidacloprid ...

Seresto collars are plastic bands impregnated with insecticides that are released over time and coat an animal’s fur. The active ingredients of the flea collar are imidacloprid and flumethrin.

Flea collars were once the go-to method for flea ... The collar's active ingredients, imidacloprid and flumethrin, are released in low concentrations over your dog's skin and coat to kill fleas ...