 Frontline
Just as anything else can become immune to things I think fleas and ticks can as well. Everyone in our area uses Frontline and have complained about flea problems on their dogs and cats. However, I use Advantage and don't have a problem. I think because everyone in this general area is only using Frontline (it is also the only product sold here in the county) has a lot to do with them having flea problems. Not that the product is bad but that the fleas are not responding to it. |