First let me tell ya one thing I have learned is Chicks and Chickens are A LOT Tougher than you might ever think
They tend to get bump, bruises, scrapes an heal just fine. So here is what I would and have done when Ive had things happen like you described.
When you look at her leg and feel it you should be able to tell if its a break. ( from what you said it doesnt sound like a break).
If you can remove her from the rest of your flock that would be best if possible.
If you have some Betadine solution or other antiseptic I would clean the area with a diluted soultion
After you clean it look to see if theres anything in the cut. If there is try and rinse it out. ( A clean squirt bottle is awesome for doing this. If you dont have a syringe)
Now I use Blue Cote to spray on minor wounds. Its medicine and it taste bad so your hen and her friends wont peck at it
Let her rest in a seperate area for a day or two and see if she doesnt bounce back
Good LUck!
