Have you been giving your four-legged gas-passer cheese or milk? Some dogs are lactose-intolerant, and any dairy product can result in occasional flatulence. If your pet's flatulence is coupled with diarrhea or vomiting, however, it is a good idea to consult a veterinarian. If there seems to be no end in sight to your pet's chronic gas, however, your pet's regular brand of food may the culprit. Check the ingredients listed on the label. Experts recommend that you opt for a formula with smaller percentages of wheat, corn and soy, which are laden with gas-producing carbohydrates.

It may take several brands before you find the one that works best for your dog or cat, but make sure you change the food gradually, starting with 1/4 part of the new food and 3/4 old, until you've completely switched over. And remember, any sudden change in diet can bring on a bout of gas or diarrhea.

Animals who eat too quickly, as well as those who eat too much, also are prone to flatulence. If your pet falls into one of these categories, you may need to modify his dinner routine. If you have one dog who gobbles his grub in a hurry just to keep your other dog(s) from eating it, consider feeding them in separate rooms.