A 43-year-old man has been charged with failing to control a dog in a public place after a teenager was attacked by a Staffordshire bull terrier.
Liam Monks, 13, suffered a serious leg injury after he was bitten by a dog at the Garrison Sports Ground in Gillingham on 29 December.
He had been playing football with friends when he was attacked. He had plastic surgery following the incident.
A 15-year-old boy who was also arrested has been released without charge.
The Staffordshire bull terrier believed to be responsible for the attack has been taken into police care.