My dog got Lyme on the same hiking trip that I did. She was treated right away (funny how it took 3 years for ME to get treated) but I don't think it was long enough. She ended up with really severe hip numbness and couldn't walk, seemed to be in lots of pain, and eventually could not control her bowels. I had to put her down in August and it was super hard - especially thinking it was Lyme too. I felt terrible that maybe if I had treated her with a longer course of abx she would have done better.
My sister's dog was just diagnosed with lyme and given 10 days of treatment. I guess I really worry about that, knowing how sick I am.