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Originally Posted by dwerten  on flea bite can make a flea allergic dog itch up to 3 weeks 
also dogs with a weeker immune system such as allergy dogs tend to attract more fleas than a healthy dog. Do you use frontline plus as that is what our derm recommends |
We've used it before. We've tried lots of flea meds, but nothing ever seems to work. We always find fleas on him.