Which Subject was the Hardest for You to Learn in Veterinary Medicine School?

I realize the answer to this question will probably depend on your school, and on your individual strengths-and-interests ... but I'm still curious. Some students have stellar memories and can memorize everything, from start to finish (e.g., anatomy, microbiology). Other students are much better with concepts, analysis, application, etc. Anyway, you get the idea. Which subject was the most challenging for you to comprehend (study and learn) in veterinary medicine school? Why?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Veterinary Source Type: forums