My Dexter had Lyme's disease, and I had NO idea. He did not have any strange behavior at all. He was 5 years old at the time. I felt HORRIBLE when the vet called me. I had just brought my boys in their annual check up, they did blood work and called me later to tell me. He was on antibiotics for 30 days, doxycycline, meat flavored, he loved it, thank goodness. 30 days later back for more bloodwork and he was good to go! No liver problems at all. Good luck to you! I'm sure your baby will be fine!