Hundreds of pigs' ears have been found dumped in a ditch in Newnham Road, Radwell.
More than 60 heavy duty orange-net bags of pigs' ears were found at the location on January 4, near to the A507 junction and the border between North Herts and Central Beds.
According to North Herts Council, some of the bags may have been there before December 31.
In September, the council faced a similar incident after hundreds of kilograms of frozen chicken were fly-tipped in Offley.
Jeanette Thompson, North Herts Council's legal and community service director, said: “We treat fly-tipping very seriously, and not only is it disgusting to see, but animal body parts will create a horrific smell and attract vermin.
“This looks like another commercial case of fly-tipping, with pigs’ ears commonly used as a natural dog treat.
"What the offender might not have realised, is that the inside of the ears are tattooed, quite literally to help identify livestock.
"So we are working with the National Farmers' Union of England and Wales (NFU) and other authorities and have a good chance of tracing the history.
“If you have any information which may assist us in our enquiries, including any dashcam footage, please contact the council immediately.”
Information about fly-tipping can be reported by calling 01462 474000 or contacting North Herts Council online.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here