When the vet came to see my two abandoned puppies he found they had the worst infestation of ticks he had ever seen, and of course Frontlined them. The ticks are dropping off them, though there are still a lot there. He told me that this year Sarajevo has a real plague of ticks, due to the warm wet weather this spring. The cats are all Frontlined regularly, but I gave them a slightly early dose yesterday just to be sure. But I have discovered that what I thought was a small scab on Napoleon's head is a tick, and despite being 24 hours since the new Frontline application it is still alive tonight and has swelled. I don't know what to do - why is the Frontline not working, and how and when do I remove it by some other method?