So in the first episode of Fear The Walking Dead we see the first zombie (the girl) eating the face of a body. After all the things we see happen to the kid, his dad goes to the same place only to find a stain of blood.
If the zombie moved the body, then there would be stains from there to the location of the body, and the dad would have found it. On the other hand if the zombie ate it all, then there would be bones remains, which there aren't.
So where did the body go?