You have to be careful with the front line ,if you read the fine print the dog can not have a bath 3 days before or after the application. I used frontline for years didn't seem to help my hound much. I swiched to comfortis ,it is wonderful for the hound but the bulldog throws it up :(
I started today adding cider vinegar to the water, they drank it fine, I read it somewhere that it works, I sure hope so .