A Wirral man repeatedly punched his puppy in the middle of a busy road.
Two members of the public witnessed Martin Frederick Jones violently assaulted the golden Labrador named Millie on Civic Way in Ellesmere Port on March 7.
RSPCA inspectors also tracked down local CCTV footage of the attack showing the 32-year-old beating the puppy after she had broken free from her lead.
A veterinary surgeon who viewed the footage and later examined Mille said the attack would have caused unnecessary suffering to the dog.
Jones, of Ellesmere Port, pleaded guilty to causing unnecessary suffering to a dog when he appeared before Wirral Magistrates on Tuesday.
He was ordered to pay £700 costs, a £140 fine and a £30 victim surcharge in addition to being banned from keeping animals for the next three years.
RSPCA inspector Anthony Joynes said: “The two members of the public who reported the matter to us actually saw an attack on the dog by Jones a few minutes after this incident was caught on CCTV.
“It was because of them contacting us that we uncovered this video which formed an important part of our case.
“I would like to thank them for reporting the matter as without people like them the RSPCA would struggle to bring prosecutions and more importantly we would not be able to re-home abused animals like Millie.
“There is never an excuse to use violence on any animal. Sometimes people use training as an excuse but training should never be physical – it should be about positive reinforcement and be reward-based.”
Millie has spent seven months in the care of the RSPCA Wirral and Chester branch but following Jones’s guilty plea she can now be rehomed.