Walter is a canine Character in DEXTER. He is a Beagle-breed of puppy, belonging to an unknown male that originally dated Rita's Neighbor and left him with the neglectful woman. She kept the dog outside at all hours, despite how much it barked and ignored it, causing Rita Bennett as well as her kids discomfort. Her boyfriend Dexter Morgan tried to talk to the woman keeping the dog out, but she ignored him. Dexter considered "alternative means" to taking care of Rita's problem with the puppy but knew it would be wrong to do so.
Rita later tried to deal with the neighbor herself but met with the same situation, instead choosing to help the poor puppy by taking it out from her neighbor's backyard and delivering it to a loving family. Yelina, her friend at work, had two nieces that would love the dog and Rita dropped him off with them simply requiring that he's loved and cared for unlike with his previous owner.