A Victorian chicken farmer on a cocktail of ice and 40 Valium tablets was trying to kill a fox when he went on a rampage with a gun and a tractor, a court has heard.

Aaron Stacie Gee started punching holes in the walls of his Little River farmhouse after bingeing on the drugs on the morning of February 26.

While his wife Jem Gee, phoned paramedics, Gee took a gun outside and fired three shots at a chicken shed on the property.

The Melbourne Magistrates Court heard that Ms Gee and the three employees working in the shed fled as Gee started up a tractor and began speeding around the farm.

One employee told police Gee was driving the tractor at such a speed it was on two wheels as it rounded corners, according to a prosecution summary read to the court.

Gee drove the tractor into a large gas tank at full speed then ploughed into the chicken shed, causing the tractor to roll.

When police arrested Gee at the large commercial farm, which he and his wife managed, they found a loaded rifle and pistol in his room.

Gee, 43, pleaded guilty on Monday to reckless conduct endangering life, using an unregistered firearm, possessing an unregistered firearm and driving in a dangerous manner.

His lawyer told the court Gee thought he saw a fox near the chicken shed and had lashed out inappropriately in his drug-induced state.

He said Gee, who suffers from bipolar disorder, had felt stressed by a combination of low wages and the demanding owner of the farm.

Magistrate Peter Reardon jailed Gee for six months and suspended his licence for a year.

Gee has filed an appeal against the sentence but was denied bail before the hearing on May 9.