A not-so-miniature pinscher dog more than double its ideal weight is among some of Britain's most obese animals who have been entered into a slimming competition.

Alfie, from Bradford, tips the scales at 9.5kg because his owner shows her affection by over-indulging him with too many treats.

He is one of 17 four-legged fat fighters bidding to shed their excess bulk as part of the PDSA's annual Pet Fit Club.

Gallery: 6 fat pets in pictures

The vet charity coaches the owners of each animal as they attempt to battle the bulge and get their pets back in shape.

According to the PDSA, around one in three dogs and one in four cats are overweight, which can reduce their duration and quality of life.

PDSA senior veterinary surgeon Elaine Pendlebury said: "Obesity is one of the biggest welfare issues affecting pets in the UK today. Sadly, it also means millions of pets are at risk from potentially life-threatening health problems related to obesity. But the good news is that obesity is entirely reversible."