The fight took place in the early hours of yesterday in Carrigart.
A number of people including the bite victim needed treatment for their injuries.
He was able to give gardaí a statement in Letterkenny yesterday afternoon.
It was one of a number of public order incidents under investigation on a weekend when the number of arrests has now passed 40.
That’s 15 more than last year.
Experienced gardaí have been shocked to discover that some of those arrested for dangerous driving are middle-aged men.
Residents of several areas have been fuming at the lack of gardaí over the weekend.
The Ramelton Road near the Silver Tassie Hotel was turned into an all-night race track, according to residents.
While people living in Ballyare complained that boy racers returned to the roads used in yesterday’s rally in the early hours of this morning.