The gurgling that you can hear from your dog's belly is a sign of an intestinal problem. You may also want to look out for other symptoms such as restlessness, whining, growling or a lot of gas. If your pooch is suffering from gastrointestinal problems then they may experience constipation, vomiting and diarrhea. Spots of blood will also appear in feces if your dog is suffering from this. Minimal cases of diarrhea are quite common in dogs, which are known as colitis. If you believe your dog is dealing with colitis then it is likely it was brought on by stress, allergies, separation anxiety, worms and bacterial infections. Also, ingesting the wrong foods such as grapes, fish or chocolate could cause such problems. When this happens, swelling will put pressure on the walls of the gastrointestinal organs which can ultimately cause a build-up of feces and gas that result in constipation and the gurgling noises you are hearing.
In order to rid your dog of their stomach problems you should perhaps withhold food for 24 to 48 hours. This is particularly important if your dog is suffering from colitis or gastritis. The reason this is advised is because it should rid the substance that is being contained inside your pet's stomach. If you are concerned that your dog may be experiencing something more serious such as poisoning then you should contact a vet as soon as you can.