Rat Tickling

Kids like to be tickled, adults not so much. But rats, apparently, love it. Well, lab rats, anyway. And you can even get a certificate in the art of proper rat tickling from Purdue University. Brianna Gaskill helped create that program while a professor at Purdue. She now works as an animal welfare specialist at drug company Novartis. She explains rat tickling training and standards. (Segment produced by Lynsey Call)