More than one in three dogs in the UK are overweight, according to a British vet charity.
The PDSA (People's Dispensary for Sick Animals) checked out nearly 30,000 dogs over the last four years.
They found that the number of fat dogs is up from four years ago, when two out of ten dogs they saw were overweight.
The charity is warning that half of all UK dogs could be overweight by 2013 if owners don't change their pets' lifestyles.
Vet Sean Wensley said: "Overweight pets are less mobile, less willing to play and more likely to develop a number of serious health conditions."
The PDSA runs a yearly pet slimming competition called Pet Fit Club to encourage owners to get their pets to lose weight.