I found some info on the internet...looks promising!

Clinical illness usually occurs 2 to 5 months after initial exposure and the likelihood of disease and the severity of the disease seems to vary with the animal's age and immune status. Cats can develop Lyme disease but it occurs rarely in them, even in endemic areas. Other domestic animals such as horses have contracted Lyme disease but it does not appear to be a significant problem. Dogs show several different forms of the disease but by far the most common symptoms are a fever of between 103 and 105 degrees, shifting leg lameness, swelling in the joints, lethargy, inappetence, and maybe most importantly, response to appropriate antibiotics.

Arthritis may be a result of both short and long term infections. Most dogs that are promptly diagnosed and treated don't appear to develop arthritis but a few dogs who don't respond completely to treatment or were not treated will develop progressive degeneration of the infected joints.

A few dogs have developed severe progressive renal disease as sequelae to Lyme disease. This severe kidney failure is non-responsive to treatment and death is often the outcome. Fortunately this form appears to be rare.

Usually dogs will not develop any rash or the circular area of redness around the bite (erythema migrans) which is seen in people.

I got this off of peteducation.com. Sorry I couldn't find more! I'll look again tomorrow.