A mother pig was slashed across the head and throat and two of her piglets stolen in a horrific attack.
David Lewis and son Callum (15) had left the herd in a field off Belnie Lane in Gosberton when thieves cut through a fence and stole the piglets.
They slashed the mother pig across the head and throat as she tried to protect her babies.
The pig’s injuries were so severe it had to be put down.
David said: “The stolen piglets were still being nursed by their mother so they would have screamed when the thieves took them.
“They probably killed the mother pig as she was trying to protect her little ones.
“We went out on the Saturday at about 4pm and came back on Sunday afternoon to find the mother pig had been maimed.
“It was just about alive but couldn’t move so it had to be put down.
“When we did a count, we realised there were two piglets missing – they are just eight weeks and ten months old.
“The thieves must have come down the lane, cut the barbed wire fence we’d just had installed and carried the piglets over the fence.
“I can’t believe it – it’s just mindless killing.”
Mr Lewis said the pig’s death brought back memories of a savage attack on a Hebridean pedigree sheep which also had its throat slashed and all four of its feet cut off while in a field near Spalding in February last year.
“We had a sheep when it happened and it just made us aware of what can happen,” he added.
“The pigs are pets and we do slaughter them when they’re ready, but at the moment we’re just hoping the little ones can survive without their mother.
“We reported it to the police and they came out straight away to take a statement.”
The incident happened between 4pm on Saturday, October 19 and 5.30pm the following day.
A Lincolnshire Police spokesman said: “PC Pete Holland of Spalding police is investigating the incident and he is keen to speak to anyone who saw anything suspicious in Belnie Lane during the relevant time period.
“It is also possible that the two stolen piglets may have surfaced in another area with little or no explanation as to where they may have come from.”
Anyone with information should call 101 or alternatively Crimestoppers anonymously on 0800 555 111.