Anemia, High Kidney Values and Fainting After Lyme Disease Treatment

We're sorry your dog is going through this. A referral is a very good next step. Fainting always deserves a prompt workup, because possible causes include heart rhythm problems, anemia and other conditions. Ask whether an ECG or a heart evaluation is needed.

A few things to discuss with the specialist. Kidney disease linked to Lyme infection (Lyme nephritis) is uncommon but serious, so ask about a urine protein test. Lyme-positive dogs should also be tested for other tick-borne infections, such as Anaplasma and Ehrlichia, which can cause anemia and low platelet counts. And kidney disease itself can contribute to anemia.

It also helps to know that Lyme antibody tests can stay positive for months to years after successful treatment, so a positive test on its own doesn't mean more antibiotics will help. Our guide to Lyme disease in dogs explains testing and complications.

This is general information, not a diagnosis. Please follow your own vet's advice.