I know I already posted here, but that's a good point Molly Moose - one that I forgot about. Chain link can be dangerous for a dog who will try to climb it. Mine used to stay in a chain link fence and Bailey actually got her JAW caught in it once and had to be rescued! She was barking and jumping up and down and somehow got caught. Who knows how? But, they can get their feet caught just by jumping against it. I'm sure I don't have to paint the picture of a dog who doesn't make it all the way over and lands on the top of the points of one of those fences . . . :(
Lots of dogs never have trouble with a chain link fence, but there is the possibility. So, if you have a choice - go wooden!