A friend of mine in the UK got chronic Lyme; it was horrible, she was hospitalised for ten weeks and had to learn to walk again.
I don’t know if the dry winter here has made them worse, but I have to say I am not impressed with the Seresto collars so far. Today, I have removed several ticks from the dogs, and they were all alive. At least with the Advantix the vast majority were dead.
I’ve only ever removed one that had become engorged. I can’t see that continuing at this rate. I’m going to ask my vet if I can use Advantix and Seresto at the same time, because Seresto is allegedly better for the sand flies.