I have 6 hens 2 are 8 months old and 4 are 5 months old. They work well together and are very sweet. Not as snuggly as I wanted it of my chicken family but sweet nonetheless. I love in the country and have recently felt the loss from the predators in the area. I'm contemplating on getting a rooster to help with protection. Can I introduce an older rooster to my flock now? Should I wait till spring and get a baby roo?