Just a word of advice: my friend who has chickens had a workman do work on his house last week. The worker had a truck dog who he let out of the truck without asking first. The dog tore around the property in fun, then found the free-ranging flock. He got hold of one Buff Orp, but thankfully, the worker called off the dog before the bird was killed. The Buff recovered, but was skittish for days. So, if you have workman come and your chickens free-range, make sure they know that their truck dogs are not welcome outside.