One of the harassed cows died a day after the attack, while the other also sustained severe injuries but is likely to survive
Local police said in a statement that around 3am on February 21st, the man's moped broke down and he broke into a farm to find a means of transport.
They said: "He violently inserted his arm several times in the anus and genitals of two cows, before masturbating." He then left the scene on the stolen tractor, before going to a female acquaintance.
The suspect was stopped by police in the historic town centre, following a chase as he drove the tractor around Fribourg with the friend. Traces of alcohol were found in his system and he had his driving licence seized before being charged with the theft of the tractor.
The next morning, when the farmer discovered the cows' injuries, he was also charged with animal cruelty. No charges have been brought against the suspect's friend.
Police said the man had admitted the crimes, and that "he said that he acted alone and was definitely under the influence of alcohol at the time of the incident".
The suspect is currently being held in custody, while a psychological expert will evaluate his mental state. The man was previously charged with 'offences against sexual integrity' when he was a minor.
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Additional reporting by Raphael Warnke.