This Silver Laced Wyandotte is Stella.
And this Barred Rock is Bonnie, my favorite hen.
And these are my 2 Rouen Ducks, Rosaire and Roxanne.
I love my little flock!
Sometimes I bathe my chickens to help with parasites and sanitation... also it makes them pretty.
Brother: "What are you doing?"
Me: "Washing my chickens."
Brother:"...why?"
Me: "Hens like to look good too!"
Everything 3riverschick said is spot on. I just want to add though that this is pretty common, sometimes a chick just isn't destined for life. I've had ducklings or a couple years now and every summer there seems to be 1 that is just like that chick and he/she usually ends up dying. I have a...
On the heat lamp, it's fine to turn it off. Leghorns are a relatively hardy breed. Once it hits 32 or less, consider turning it on again. I had a variety of chicken breeds and I often wouldn't turn it on till it hit the 20s.
Is your run covered? Maybe a little shade would encourage them to go...