I am so sad to hear that Dr. Zweighaft has gone over the rainbow bridge. I figured it out when I was calling for a refill prescription and he did not return my call, I knew there was something wrong and I did my research. Dr. Z had been a caring vet to my pets for over 20 years, he would see me in the middle of the night with emergencies and always took the best of care. He sometimes cured my babies and sometimes they breathed their last breath in his office but I always knew he did everything he could with care and compassion. He was more than a Dr. he was a friend and my family and I will miss him greatly.