A. He may have flea allergy when 1 flea bite can trigger excessive itchiness of the whole body. If you still find fleas on him despite using Frontline you should consider spraying your carpets at home and wash dog's bedding to get rid of fleas in his environment. If you have done all of these you should change flea treatment to a different product. If you take your dog to your vets they will be able to give him injections to relief itchiness.
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