Princes marketing director Neil Brownbill confirmed an in-house PR review was taking place, saying: 'We are considering how we handle our PR going forward.'
Brownbill - who is overseeing the review - said he had had 'ongoing conversations with a number of agencies' about Princes' PR account but said: 'There is no change to ongoing arrangements.'
The agency contract has been held by Countrywide Porter Novelli for almost three years, and Brownbill said CPN is currently continuing to handle Princes' PR, saying: 'There will be no change in our PR over the short-term .'
'We review all our marketing services on an ongoing basis. How we make decisions of this nature is for ourselves to decide,' he said.
CPN's work on the account has been handled by its Leeds office, with managing director Trudy Worth heading the account team. Worth declined to comment on the review.
Princes has three main divisions in the UK: soft drinks, 'manufactured' foods, such as sandwich fillings, and its canned food division.
CPN has handled consumer and trade PR campaigns for Princes, mainly working on the canned food division, promoting fish products such as tinned tuna, mackerel and pilchards, plus tinned meat products like corned beef.
Prior to CPN, the account was handled by London-based Richmond Towers, which ran consumer and trade campaigns for the Liverpool-based company for more than five years.
Princes' closest market rival is John West Foods, which is also based in Liverpool and produces similar canned food lines including sardines, salmon and fruit in juice.
Princes, a subsidiary of Japanese conglomerate Mitsubishi, has more than 3,000 staff across sites in the UK, Holland and Mauritius.