It is normal for a dog's ribs to be larger than their belly. Some breeds of dogs are more slender and less likely to gain weight, so their belly will be more deflated and the ribs will look larger than their belly; or they may be malnourished. Dogs suffering from gastrointestinal diseases may also experience this phenomenon.
Tips:
If your dog suddenly has ribs that are larger than its belly, it is best to take your dog to the pet hospital for examination. to avoid delaying the condition.