They’re so close that Osiris will even lets Riff crawl in his mouth and clean his teeth for him! The friendship that seems to only in this animation is entirely real!Despite their enormous size differences, Riff the Rat and Osiris, a Dutch Shepherd, became best friends. They were drawn together by their differences! Riff Rat was rescued from the brink of de.ath when he … [Read more...] about Depressed Rescue Dog Had No One To Play With Until He Becomes Best Friends With A Rat!