Using models and simulators in the lab, students can learn basic skills such as suturing, collecting blood, or placing an intravenous catheter in a dog or horse. As students' knowledge and skills progress, they learn complex techniques and procedures using more technical aids. Frosty, a Holstein cow pregnancy simulator, gives students plenty of opportunity to assist with her always-difficult births. Petunia, an alpaca model, provides students with practice collecting blood on a species in which the jugular vein is not easy to find. There is even a computer-assisted anesthesia simulation programmed with 15 different scenarios, requiring students to correct abnormalities in the "patient's" response to the anesthesia.