We added a color Doppler Ultrasound machine last Fall. We are using it almost daily to perform pregnancy diagnosis and for abdominal organ scans. We can do full abdominal or single organ scans, and can take needle aspirates using the ultrasound.The main advantage for a needle aspirate, is that it can many times give us a diagnosis of a disease condition in the the liver or other organ without having to put your pet under general anesthesia for a surgical biopsy. It is a safe an effective tool to diagnose pregnancy in your pet, as early as day 20.