For 2 years I had been using stronghold for my cat, with no problems but then all of a sudden it stopped working. So I changed to frontline, didn't work at all. I've been using advantage for around 6 months and now this has also stopped working!! Wtf is going on? I'm being bit to death, due to give birth next month and have no idea what else to try.
I only did the last dose of advantage a week ago, if I bought more today would I be able to use it or is it possible to overdose him on flea treatments?