I recently acquired 3 Salmon Faverolle bantams. I have regular sized chickens but I am getting bantams and keeping them separate from the other chickens, so the bantams will have their own chicken run. They will be in a goat shed that will be turned into a chicken coop for the bantams. I dont have the goats anymore so I have this fence where they used to be. Its a small area but is pretty big for bantams. The fencing is 4 ft high and I know bantams are pretty good flyers, so I'm worried they could jump out and get picked on by the big chickens on the other side of the fence or the dogs kill one because of their size. Im soon getting cornish bantams and more bantams soon, so I dont want anything to happen to them. They will all be pets and I need someone to tell me if they would fly over the fence. If they can fly over a 4 foot fence then how tall should it be? Please help!!! Thank you!!