SInce that time, Lentil has visited hundreds of patients at Children's Hospital of Philadelphia.
He's enormously popular there, and children such as hospital patient Danny Pfeiffer have bonded with him.
Pfeiffer, 14, has a genetic condition called Saethre-Chotzen syndrome, in which the skull bones fuse prematurely, preventing the skull from growing normally and affecting the shape of the head and face. He says Lentil has helped him deal with the many complications that come with facial surgeries.
"He doesn't look like, you know, a regular dog," says Pfeiffer. "So that kind of makes him special, so it probably makes kids who have something that I have, makes them feel special."
Since his successful surgery in May, Lentil has been able to eat and drink without help.
He's already been the mascot for the Lentil Festival in Philadelphia to raise money for craniofacial awareness, and he just returned from a Children's Craniofacial Association kids' camp in Orlando, Florida, a gathering place for children nationwide with craniofacial conditions. Pop star Cher serves as a national spokeswoman for the group.
When he isn't traveling, Lentil greets fans at Condefer's Philadelphia pet shop. They come to thank him for his work in raising awareness. Fans call him "the Bean" and themselves "Beanstalkers." Meanwhile, Lentil's Facebook page just keeps growing.
Condefer still can't get over her pet's impact.
"Seeing him meet these children -- and he would just go up to them, sleep on their lap and you could see how they related to him and how he related to these children -- it was wonderful," she says.
"He's here for a reason, and he's made it for a reason, and that's what makes him special."