Dr. John Oliver genuinely cares about the animals that he treats at Trenton Vet Hospital and their owners. I had a 9 year old setter that began showing sudden and unexpected aggressive behavior to my family and friends. Dr. Oliver talked to me about different behavioral problems and causes, and things to try. Still she was growling and showing her teeth, barking at her own family. He then ran extensive blood work, x rays, and tried different behavior modifying drugs. Our dog was still showing aggression to the people she loved and who loved her. I cannot tell you how hurt and worried we were. Dr. Oliver was so kind and I think he genuinely felt our pain. He said that he wished there was more that he could do. When our blood work results came from the lab, he called us personally to give us the results. There was no apparent physical problem causing this extreme change in our dogs behavior. He suggested she might have a tumor in her brain. Finally after and especially frightening show of aggression we decided to euthanize our dog before someone got hurt by her. Dr. Oliver stayed late that night to care for our dog, one last time. The kindness and the gentleness he showed to our dog and to me was very touching and I appreciate it more than I can say. I have three other pets and I will continue to put my trust in Dr. Oliver and his recent associate Dr. Mann.