Even if he is chewing on his fur, once he becomes comfortable with his new home, he'll stop.
When I first adopted my chin Zidane I noticed that he had shorter patches of hair on his hips (oddly it's the same place they put the designs on a My Little Pony. I also believe that he was stressed out with his first owner. I'm not sure what went on there but he has moments where he's skittish for no reason) but I have noticed that the fur is growing back and there aren't any new shorter areas. I just make sure he has a good variety of stuff to chew on each day.
Basically fur chew is a nervous habit kind of like chewing on nails. They'll stop once they calm down.