here is what i found Causes
According to the links below, it is thought that the following may be the primary contributors to bloat. To calculate a dog's lifetime risk of bloat according to Purdue University's School of Veterinary Medicine, click here.
Stress
Dog shows, mating, whelping, boarding, change in routine, new dog in household, etc.
Although purely anecdotal, we've heard of too many cases where a dog bloated after another dog (particularly a 3rd dog) was brought into the household; perhaps due to stress regarding pack order.
Activities that result in gulping air
Eating habits, especially...
Elevated food bowls
Rapid eating
Eating dry foods that contain citric acid as a preservative (the risk is even worse if the owner moistens the food)
Eating dry foods that contain fat among the first four ingredients
Insufficient pancreatic enzymes, such as Trypsin (a pancreatic enzyme present in meat)
Dogs with untreated Exocrine Pancreatic Insufficiency (EPI) and/or Small Intestinal Bacterial Overgrowth (SIBO) generally produce more gas and thus are at greater risk New
Dilution of gastric juices necessary for complete digestion by drinking too much water before or after eating
Eating gas-producing foods (especially soybean products, brewer's yeast, and alfalfa)
Drinking too much water too quickly (can cause gulping of air)
Exercise before and especially after eating
Heredity
Especially having a first-degree relative who has bloated
Dogs who have untreated Exocrine Pancreatic Insufficiency (EPI) are considered more prone to bloat New
Gas is associated with incomplete digestion
Build & Physical Characteristics
Having a deep and narrow chest compared to other dogs of the same breed
Older dogs
Big dogs
Males
Being underweight
Disposition
Fearful or anxious temperament
Prone to stress
History of aggression toward other dogs or peoplePrevention
Some of the advice in the links below for reducing the chances of bloat are:
Avoid highly stressful situations. If you can't avoid them, try to minimize the stress as much as possible. Be extra watchful.
Can be brought on by visits to the vet, dog shows, mating, whelping, boarding, new dog in household, change in routine, etc. Revised
Do not use an elevated food bowl
Do not exercise for at least an hour (longer if possible) before and especially after eating
Particularly avoid vigorous exercise and don't permit your dog to roll over, which could cause the stomach to twist
Do not permit rapid eating
Feed 2 or 3 meals daily, instead of just one
Do not give water one hour before or after a meal
It dilutes the gastric juices necessary for proper digestion, which leads to gas production.
Always keep a product with simethicone (e.g., Mylanta Gas (not regular Mylanta), Phazyme, Gas-X, etc.) on hand to treat gas symptoms.
Some recommend giving your dog simethicone immediately if your dog burps more than once or shows other signs of gas.
Some report relief of gas symptoms with 1/2 tsp of nutmeg or the homeopathic remedy Nux moschata 30
Allow access to fresh water at all times, except before and after meals
Make meals a peaceful, stress-free time
When switching dog food, do so gradually (allow several weeks)
Do not feed dry food exclusively
Feed a high-protein (>30%) diet, particularly of raw meat
If feeding dry food, avoid foods that contain fat as one of the first four ingredients
If feeding dry foods, avoid foods that contain citric acid
If you must use a dry food containing citric acid, do not pre-moisten the food
If feeding dry food, select one that includes rendered meat meal with bone product among the first four ingredients
Reduce carbohydrates as much as possible (e.g., typical in many commercial dog biscuits)
Feed a high-quality diet
Whole, unprocessed foods are especially beneficial
Feed adequate amount of fiber (for commercial dog food, at least 3.00% crude fiber)
Add an enzyme product to food (e.g., Prozyme)
Include herbs specially mixed for pets that reduce gas (e.g., N.R. Special Blend)
Avoid brewer's yeast, alfalfa, and soybean products
Promote an acidic environment in the intestine
Some recommend 1-2 Tbs of Aloe Vera Gel or 1 Tbs of apple cider vinegar given right after each meal
Promote "friendly" bacteria in the intestine, e.g. from "probiotics" such as supplemental acidophilus
Avoids fermentation of carbohydrates, which can cause gas quickly.
This is especially a concern when antibiotics are given since antibiotics tend to reduce levels of "friendly" bacteria. [Note: Probiotics should be given at least 2-4 hours apart from antibiotics so they won't be destroyed.] New
Don't permit excessive, rapid drinking
Especially a consideration on hot days