Has anyone experienced this before? I adopted a recently spayed 6 mo. kitten. Kept her in bathroom a week as she had URI and we have another cat. She never scratched herself, but I noticed flea "dirt" on her white bed, so started flea-combing with mild Dawn solution ASAP. Got about 6 fleas over a couple days, so applied Hartz spot flea treatment. Now, no more fleas in comb after 4 consecutive days of looking, no more flea dirt in bed, but kitten is scratching like crazy (suddenly biting at her fur/licking, scratching neck, etc. with hind feet), more than she ever did when she actually had the fleas. Is it possible the buggers are so smart I'm not getting them? Is my combing irritating her skin? Could she be allergic to the flea treatment? I'm paranoid she still has fleas and could be spreading them in the house, but I swear I can't find any evidence...except her scratching. HELP! Please.