My dog has permanent short hair on the lower part of his back near his tail. If he gets flea bites it irritates him and he bites himself sore. I have sprayed the whole house with Acclaim, the dog and 3 Cats are regularly treated with advocate which is put on carefully and spread out when spotted on. Dog and cat bedding all been washed etc. Dog has even had advocate fortnightly at one point, have also tried Comfortis and frontline. And yet, when I check him, he always has the odd flea or two on him.. But never looks infested. Could it just be due to hedgehogs in the garden? Haven't seen any flea infested areas in the house, just occasionally find a flea on us. It makes me feel a failure and helpless as I feel I've covered all the guidance given. Any similar stories or suggestions?