Both Bella and Ripley have been on Frontline for months and months now. Thankfully they also have both had the Lyme vaccine although for Bella it came after actually having contracted Lymes. :( My question is this. I just found a tick on Bella and it was larger than its normal size - somewhat engorged. :mad: Aren't ticks supposed to die IMMEDIATELY when they bite a dog who is protected with Frontline? I just hate ticks! :mad: