The PDSA charity says a large number of pet owners in Wales and across the UK aren't feeding their animals the right diet.
The organisation warns that a poor diet combined with a lack of exercise could lead to reduced life expectancy in a pet.
Pet obesity poses not only major health risks such as diabetes, arthritis and heart disease, but sadly also means daily misery for millions of pets who are feeling the strain from carrying too much weight.
More top news
Former Cardiff Blues captain Andries Pretorius has been forced to retire from the sport after being diagnosed with a muscle disorder.
As the Met Office issues a cold weather warning, spare a thought for the chimps struggling to keep warm at this Ape and Monkey Sanctuary.
Care workers in the Rhondda who were made redundant say they could lose their homes as redundancy money has still not been paid.