I'm fight a battle agaisnt fleas on my ratties. I don't know where I went wrong. I've been using FrontlinePlus on them but they got fleas anyway. Perhaps it's because I did not adjust the dosage when Eddie gained weight or perhaps because I bought it online instead of a known source. The ratties have been getting bath after bath and a couple nights ago I used a flea bath and there are still fleas! Now I've given them a second dose of Frontline only 3 weeks after the last. I was afraid of overdosing them but they seem OK. Tomorrow I will try the flea bath again. Someone told me to put cornstarch on them. Anyone heard of this?