Hello everyone! I am new to chickens and had a question about one of mine. I have 5 chicks total all around 1 week old. My Australorp's and Wyandotte's are growing quickly and I keep seeing some feathers come in. My speckled Sussex is much smaller and I haven't noticed much growth since I got her on Saturday when the other chicks seemed to grow overnight! She falls asleep at the drop of a hat while standing and kind of falling forward on her face. When I hold her, she also instantly falls asleep while the other chicks are pretty curious. She seems to drink and eat fine and has never had a plugged bottom. I just wanted to make sure she was doing ok and thrives like the other chicks do. Any advice is greatly appreciated!!