I'm so glad someone posted about this! I was going to ask the same thing today! We've got a 6' fence, but our neighbours on both sides have dogs (fortunately neither of them has fences and their small breed dogs are hardly ever outside), I'd hate to think of my chickens flying over the fence and getting hurt/scared by dogs or wandering off getting lost. But I only plan to let them roam around the yard when I'm home and can keep an eye on them.
How much do you clip off of the feathers, and how many feathers do you clip?