Mr Guy, 31, was found dead in the driveway of his home on Aorangi Rd, south of Feilding, on July 8.
A post-mortem confirmed he died from several gunshot wounds.
Last Wednesday, police said they were investigating whether the disappearance of three chocolate labrador puppies from Mr Guy's property on the day of his death was linked to the murder.
They were followed up reports of a woman trying to give away chocolate labrador puppies in the carpark of The Warehouse in Palmerston North last Wednesday.
A woman pulled into the carpark, on Pioneer Highway, in a dark coloured stationwagon about 3pm and offered customers there a puppy, indicating she was giving it away, rather than selling it.
Two other puppies were seen in the front seat of the her car.
Police today said the woman had come forward and had been eliminated from the inquiry.
The puppies she had were not labradors, police said.
Police were now trying to identify the drivers of two vehicles seen on the morning of Mr Guy's death in the Aorangi Road area.
No detailed descriptions were available, but both were seen driving along Aorangi Road toward Campbell Road, away from the location of Mr Guy's home between 4.30am and 5am on July 8.
On the day of his murder, Mr Guy got up early as usual to go milking and drove his ute to the end of his driveway.
He stopped and walked around to the front of the ute, and it was then that he was shot and killed, some time between 4am and 7am, police said.
Police wanted to speak to anyone driving down the road between 4.30am and 5am to eliminate them from the inquiry.
Detective Inspector Sue Schwalger said police still wanted to hear from anyone with information about the missing puppies.
