Our SS was not friendly when she was younger. We got her at 5 days old and handled her a lot. She was flighty and not social at all. One day when she was about 2 months old she suddenly decided she loves people. Now she follows us around the yard complaining that she isn't getting enough attention. Yep, she is very loud and talks constantly.
I love that about the sussex! Mine are constantly underfoot or examining my hands and scolding me when I don't have treats. Even the less friendly ones would join in.
I think my "mutt" must have some Sussex in her. She's LOUD & it sounds like she's always whining " Trrreeeats....Treeeeeeats" as she follows me around She also stands on my feet until I pick her up. There are only so many chores I can do one-handed, so as soon as she gets put down, she starts whining again. She's also a camera hog. I can never take pics of anything while she's in my lap. Notice the group of hens under the tree? - my intended pic.Our female is the same way, although she has been friendly since day 1. Our rooster on the other hand has been friendly since day 1 than at 8 months decided he likes to charge people. He doesn't do it as much now though. But all of our chickens will come running as soon as they see you, Ducks too. They think everytime we come outside we should have treats! haha