I have a small flock of 3 hens. I'll probably get some more hens this spring/summer. My current hens are about 2 and a half years old, currently not laying. I have been offered a very nice roo. I've never had one before. Do I have enough hens for him? Will it be hard to introduce him into the flock? I am feeling kind of sorry to bring in a roo when my poor hens have never been subjected to one before. Should I hold off and get a roo later when I have newer hens? This is a very nice roo and I know they are hard to come by so am kind of hating to pass him by. Also, I've been told that roos protect the flock. How much 'protecting' do they actually do and what do they protect from?