Animals are animals no matter what we do to train them. Their beastialistic instinct never cease to exist. However, there are who could be trained well. But there are some who would always be aggressive no matter how well you treat them. So be aware of such animals through this video. We have found this video about the worst ten aggressive animals:
[youtube https://www.youtube.com/watch?v=LPPl4ll_574&w=560&h=315]