There are a bunch of negative bias for rats. For many years the rats identified as the main culprits behind the bubonic plague, that swept Europe in the 14th century, resulting 75-200000000 people lose their lives.

Recently, the much-scorned this rodent was acquitted of any misdeeds thanks to scientists. Today rats are extremely popular pets. Abby but Roesner, has moved its training of rats in quite another level. Using a few delicacies, has learned among other things to come when she cries, beheading in a tiny basket and give it a tissue when sneezing.