My neighbor and I live a few houses apart from one another and we both got a pup from another neighbor's litter. Her pup is LOADED with fleas but mine isn't. We know the fleas are out in the grass and what have you... but can't figure out why her pup is loaded and mine isn't. But that's beside the point.... both of the pups went to the vet around the same time. Both of us were given the frontline from the vet. She's already put hers on her pup.. I have yet to put mine on my pup. I have however... bathed my pup a few times in puppy flea shampoo. She's tried the brewers yeast tablets and they did not help at all. Then she came down my house and bathed her pup in the same flea shampoo I used on my pup and it did not help. Is there anything else she can do. The vet said the frontline should work and obviously it's not working for her pup. The puppy is miserable with the fleas and so is my neighbor. She pulls off at least 30 fleas a day with the flea comb and they come right back as soon as she goes outside to relieve herself. She bombed her house a few weeks back when her kittens had fleas. The don't see any fleas anywhere in the house just on the puppy itself. The kittens are now gone and momma cat went back outside. So, there are no other indoor pets inside besides this pup.