The active ingredients in Seresto are locked within the collar and released at very low doses, making Seresto safe for use around families and within the home. This has been confirmed through multiple safety studies. However, as with any flea and tick treatment, there are some standard safety procedures you should follow. Please read the label before you use it.

She should wear Seresto for Large Dogs since she's over 18 pounds. The collar is 27.5 inches wide and it's adjustable.

We also stock Seresto for Small Dogs under 18 pounds - https://www.jetpet.com/p/9294081/seresto-tick-and-flea-collar-for-small-dogs.html

Yes, we do stock Seresto for Cats too https://www.jetpet.com/p/9294082/seresto-for-cats-tick-and-flea-collar.html

Seresto collars are waterproof so it won't loose its effectiveness.