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Hydrolysed diets 'may be beneficial' for feline vomiting and/or diarrhoea
Cats with chronic vomiting and diarrhoea may benefit from a hydrolysed diet.
Researchers assess cats prescribed a hydrolysed diet before antibiotic treatment.

Cats with chronic vomiting and diarrhoea may benefit from a hydrolysed diet before antibiotic and/or glucocorticoid therapy, according to new research.

The study, published in the Journal of Small Animal Practice (JSAP), describes the responses of cats prescribed a hydrolysed diet with or without concurrent antibiotic and/or glucocorticoid for chronic vomiting and/or diarrhoea of undetermined aetiology. 

JSAP editor Nicola Di Girolamo, said: “The results of this study are particularly prudent with the increased awareness and understanding of the role that companion animal veterinary surgeons can play in preventing the development of antimicrobial resistance.”

In the study, researchers at the Royal Veterinary College (RVC) reviewed the medical records of some 5,000 cats with evidence of receiving a hydrolysed diet for gastrointestinal indication, prior and concurrent medication and response after hydrolysed dietary intervention.

Poor response was defined as evidence of receiving antibiotic or glucocorticoid treatment for vomiting and/or diarrhoea at visits after the onset of the diet, or death from gastrointestinal signs for a follow-up period of at least six months. Researchers found that 42 per cent of cats that were first prescribed a hydrolysed diet with or without concurrent antibiotic and/or glucocorticoid had a poor response. 

Dr Aarti Kathrani, a senior lecturer in Small Animal Internal Medicine at the RVC, and corresponding author of the paper explained: “Antibiotic and/or glucocorticoid administration before and concurrent with the diet were associated with higher odds of a poor response. 

“Although our study was unable to determine the causality behind this association, possible explanations may include the association of antibiotic and glucocorticoid treatment with severity of GI signs, prescribing habits of veterinary surgeons, or the effects of antibiotic and glucocorticoids on the intestinal microbiota and mucosal immune system, respectively reducing the effectiveness of a hydrolysed diet.”

Nicola Di Girolamo added: “Although the information available did not allow the authors to correct for the severity of the condition of the individual cats, and this fact could have biased the results if cats that had a more severe condition -and therefore more likely to have a poorer outcome - were immediately prescribed additional medications other than the hydrolysed diet. 

“These results are a base for further randomised controlled trials and provide useful guidance for veterinary surgeons facing similar situations.”

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FIVP launches CMA remedies survey

News Story 1
 FIVP has shared a survey, inviting those working in independent practice to share their views on the CMA's proposed remedies.

The Impact Assessment will help inform the group's response to the CMA, as it prepares to submit further evidence to the Inquiry Group. FIVP will also be attending a hearing in November.

Data will be anonymised and used solely for FIVP's response to the CMA. The survey will close on Friday, 31 October 2025. 

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News Shorts
CMA to host webinar exploring provisional decisions

The Competition and Markets Authority (CMA) is to host a webinar for veterinary professionals to explain the details of its provisional decisions, released on 15 October 2025.

The webinar will take place on Wednesday, 29 October 2025 from 1.00pm to 2.00pm.

Officials will discuss the changes which those in practice may need to make if the provisional remedies go ahead. They will also share what happens next with the investigation.

The CMA will be answering questions from the main parties of the investigation, as well as other questions submitted ahead of the webinar.

Attendees can register here before Wednesday, 29 October at 11am. Questions must be submitted before 10am on 27 October.

A recording of the webinar will be accessible after the event.