Brian Warren, 86, was killed by the animal at Hall Farm in the village of Fornham All Saints in Suffolk.
The widower was attacked by the five-year-old Simmental in a field at his farm on Saturday night. Emergency services were prevented from helping him for half an hour until the bull was put down by a local gamekeeper. By the time doctors reached Mr Warren, who ran the farm with his son Martin, 36, he had died from his injuries.
His friend Sebastian White said that Mr Warren's death would be a sad loss to the community. "He was a great person to be with and had a great sense of humour. He was a very kind person who will be greatly missed," he said.
Mr White, 34, said that despite his age, Mr Warren was fighting-fit and still worked on the farm as normal. "He was a very fit man andwould have shown up someone half his age," he said.
He was attacked by the bull as he went to check for newborn lambs at the start of the lambing season.
The Health and Safety Executive has been informed and an inquest will take place.