I had two hen turkey, but one took off. The Hen that stayed is around 6 months old. I found someone that is selling turkeys. She has one hen around 6 months old and also has 2 hens that are 1 and a half years old. Should I buy all three turkeys from her or should I just buy the one that is about the same age as mine? I have never added turkeys. How do I introduce the turkeys?