The geographic range of canine Lyme disease continues to grow every year beyond its strongholds in the Northeast and upper Midwest. Many dogs, initially or even later, do not show obvious signs of any negative health impact. When signs do occur, usually they are in the form of lameness or arthritis due to disease impact on the joints.
Other signs can include fever, appetite loss and lethargy.
Lyme Disease for Dog Map courtesy of CAPC Parasite Prevalence Maps.