Why has my dog’s belly gotten bigger?

A dog’s belly may enlarge simply from being overfed, with food piling up in the gut making it look big; once digested, the abdomen returns to normal. But if overeating causes indigestion, the swelling may last longer, in which case the owner can give pet probiotics to aid digestion.

In addition, pregnancy, ascites, or parasite infection can also make the belly bigger, so the owner should judge the actual cause and give proper help.