It’s common for pets to carry too much weight without their owners realising. This podcast explains how to identify this, and how to stop the weight gain before obesity develops. I’ve also written about this topic, using the example of Nola, a young adult terrier cross who’s pictured above. You can read my regional newspaper pet column with Nola’s story here.
Please note that I am unable to answer veterinary questions in comments. If you have questions or concerns about your pet's health it is always better to contact your vet.