I bought two of these collars for my cats. The first week it looked promising..only a few fleas. After that the fleas kept coming. The fleas are actually jumping around on the cats. This is even less effective than the Advantage II.

I was hesitant to pay so much for a flea collar, but it is worth the price. Within a week my cats were no longer suffering with flea bites. I had tried spot on remedies, spraying the house and nothing worked. I am thrilled with this product.

My outdoor cat, Thomas, has a severe reaction to flea bites. He gets scabs all over his body which last all year long. I have tried the liquid flea control on his shoulder blades, but his hair falls out. He has been wearing the Seresto collar for about a month now and I can already tell a difference in his coat. The scabs are clearing up and his hair is looking healthier. I am amazed at how good it works.