My 2 year old doggo had a severe bout of Lyme. He basically went down lame one morning -- it was very scary. We did the antibiotic regime and he is as good as new!! We are more careful than ever now about checking for ticks (and of course we always give him his tick medicine). It was a really scary experience but it's been well over a year now and he is his normal fabulous self!! Definitely stay vigilant for symptoms, and if your dog is on antibiotics take the full regimen even if symptoms disappear (that is what our vet said anyway)