go bartles.>> he'll do that all day if we give him the opportunity. >> reporter: so, suffice to say, there is some fun in this job. >> it's the funnest job in the world. 50% of the time. >> reporter: the other 50%? a combination of tragedy and frustration. first, the tragedy. a closer look in hannah the hedgehog's mouth reveals some bad news. >> like a big bloody hole and there should be teeth there and there aren't. >> that is really bad. >> reporter: dr. wilson fears the worst. >> i'm worried that it could be cancer. >> reporter: cancer. it's a hard message to give to hannah's owner. >> she might become more lethargic, less active. if it is cancer, there will come a time, you know, when she is going to kind of start to shut down. >> it was really sad to look at the x-rays and see her poor little jaw. i feel like i've had a little friend. i wish she would live forever but that's not the life span of hedgehogs. >> reporter: but sometimes these doctors make things go right in stunning ways. for sa