The chickens overheated and suffocated after the barn air supply was cut by a lengthy power outage.
Activists say winter grazing is an environmental and animal welfare issue.
Adam Tipene was sentenced on Tuesday.
The festival in Yulin China, attended by thousands goes ahead despite a government campaign warning against the practice.
Two animal welfare organisations have gone to court to improve the protection of pigs.
More than 300 cows had their tails broken.
Two bulls have been killed in sporting events this summer.
"Gut-wrenching, illegal, and morally abhorrent."
"This cow suffered greatly as a result of her owner's negligence."