My dog Hercules had lyme Disease last spring. He was treated with 6 weeks of Doxycycline(sp?)and he has been fine. He never has ay syptoms either. It a good thing that where I live vets test for Lyme every year just like heart worm. In my area 80% of ticks have lyme.

I work at a animal hosp. And last year a dog came in that couldn't walk. We found out that he had lyme. So he was put on Doxy and the next week the dog came back to the hosp. walking. It was so amazing. His owner was so happy!

Hope this helps!