I would never let my Silkies free-range. I am almost finished with a 28' x 14', 6.5' tall hardware cloth/chicken wire on top fence for them- I have 6. I will not let them go into the new run unless I am watching them. They have to stay inside a 6x8' predator-proof hen house with lots of windows and a box fan, unless I am at home and outside with them. Sometimes I put them in my 'flower bed' area, which is enclosed in a 6' board fence - it's quite large, so they have a great time in there. I sit with them and feed them peanuts while they climb all over me...and when I have to go inside the trailer, they go right back into the hen house. I refuse to take any chances with any of my chickens.