"It's a minority that are bringing all quad bike drivers into disrepute. The enforcement of quad bikes will go up and people need to be aware they should be wearing safety helmets.
"They need to be more responsible, they shouldn't let kids drive or drive a quad without a licence. There are instructions on new bikes that say you should not carry more than one person."
Rosie's owner, Kay Hamilton, said she was "on cloud nine" to discover a man had been charged after she identified someone in a photo line-up. "It's given some closure to that chapter so I can begin to move on. It's a dangerous thing he did, it was just such cruelty."
She wanted to clarify that she never let Rosie off her leash, except on the beach when there weren't many people around.
The tiny terrier was always restrained when walking the region's Rotary pathways or hiking up Te Mata Peak, which they did regularly on weekends.