A 9-year-old girl was attacked by a pit bull at her Legacy Road home on Thursday.
Lancaster County Animal Control Director Joel Hinson said the attack happened during a family get-together.
The girl and other children were jumping on a trampoline.
Hinson said the male pit bull, named Powder, broke free from his chain on a runner and charged the children, biting the girl on her left leg.
"She's going to have to have skin grafts," Hinson said Friday. "She was tore up pretty good."