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The research, carried out by the Royal Veterinary College’s (RVC) VetCompass programme, involved analysing data from 333,910 bitches who presented at veterinary practices participating in the programme between 2014 and 2017.
The study also indicated that the females of certain breeds are more prone to UI than others, with Hungarian Vizslas, Doberman, Weimaraners and Boxers most at risk.
UI affects around 3% of bitches in primary veterinary care in England.
The researchers say that a connection between neutering and UI in bitches has long been suspected but this study provides stronger evidence on the extent of the relationship.
The data also showed that age and bodyweight are major contributory factors to bitches developing UI as well as neutering and breed. Other key findings include:
Bitches over nine years old are 1.7 times more likely to develop UI compared to those younger than three years.
Bitches weighing over 10kg are 1.9 more likely to develop UI than those weighing less than 10kg, while bitches over 30kg are three times more likely.
Camilla Pegram, VetCompass epidemiologist and lead researcher on the study, said: "First opinion vets discuss and perform neuters on a daily basis but, until now, evidence on the link between neutering and urinary incontinence has been tenuous.
"This study provides stronger evidence of an important association between neutering and urinary incontinence. The decision to neuter a bitch is based on many factors, not just incontinence risk alone. However, these results suggest that the component of the decision driven by urinary incontinence could be emphasised for the high-risk breeds and bitches of larger bodyweight.”
It is hoped that the results will aid owners and vets in making evidence-based decisions when it comes to neutering female dogs.
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