Feeding too quickly before/after exercise can result in bloat due to the fact that running in vigorous exercise can often result in swallowing large pockets of air which contribute to gas build up in the dog's stomach.

There are quite a few theories on bloat, size of meal, increasing meal size greatly/rapidly, content of meal especially abnormal amounts of fat, powders added on top of kibble, water(dampening the kibble) being added to high grain kibbles, gulping of food and large pockets of air at the same time, and gulping of their water/pockets of air supply around their mealtime.

Much like human beings a dogs stomach resembles something like a balloon. While for humans over eating and eating too quickly can result in bloating and gas as well as an uncomfortable feeling generally humans are able to recover quickly with minimal illness. Dogs, however, are not so fortunate.

I have read that there is no definitive data as to why bloat occurs, to me it just comes down to respect for the dog's stomach. And as always the case - know your dog and keep to a routine as much as possible, and don't try and make up/go overboard/get too fancy for food times in anyway.

There was a story about dogs in the USA that worked for the military, and they actually developed an operation, something like stitching some of the stomach to the top, so it couldn't turn.
They were sick of losing their great dogs to bloat.
Now why was it so prevalent, I don't think they went into that, not from the part of the story that I viewed anyway. So obviously these dogs were active with their human co-workers, and what access to food did they have, did they have to constantly reward the dogs?
Anyway, if you are asking about a greyhounds' stomach, well we all know how fast paced they are,
so they need alot of respect -
and also because bloat is more common in deep chested, large breeds.

Generally I believe that there is not much more that you can do.
Obviously if you are in doubt in anyway with information supplied, always seek your vet's advice.

As it is not called "the mother of all emergencies," for nothing.

Mouth/teeth
Human jaw- can move up and down side to side and in a rounded motion. Teeth are designed for grinding having a flatter surface.

Dog jaw- can only move up and down. The teeth are designed to crush dense objects, having a three root system and are solid and sharp.

Saliva
Human- used for breaking down food and lubricating digestion.

Dog- also used for lubricating food but they lack the enzymes to break down food. Instead their saliva contains enzymes that kill off bacteria. If you've ever seen your dog eat something old and gross and not get sick? Now you know why.

Oesophagus
Humans- helps keep food from entering the wind pipe and designed for food to stay in our stomachs

Dogs- Good gag reflex. Even though dogs cannot chew up their food before it goes down the throat, it must still be the right size and amount to fit. If not, the dog simply throws up! Your dog is not sick. It's just his body telling him to try again.

Stomach
Humans- food takes about one hour to move through our stomach, but depending on the amount and complexity sometimes longer.

Dogs- this is where most of their ability to break down foods take place. Their stomach is more acidic so it can break down large pieces of meat and bone. Food is kept in the stomach for a longer period of time, allowing the acid to break down animal proteins, bones, and fats. This explains why dogs can live with being fed only once or twice a day. They feel full longer because the food remains in their stomach longer.

Intestines
Humans- where absorption of food takes place, the human intestinal tract is a lot longer than a dogs and therefore the body has more time to absorb nutrients from more complex foods such as plant and grain based foods.

Dogs-Digestive tract is a lot smaller. This means the dogs have less time to absorb nutrients from their food. This is why dogs do better on foods that are easily broken down such as meats bones and organs. But can struggle on complex foods such as plants and grains. This also means that bacteria have less time to multiply and cause problems. Ever seen your dog eat poop? Plant based nutrients found in poo have been pre-digested making it a very convenient meal for our canine friend."end of qu.

If it is predetermined that the dog will bloat late feeding after work will help somewhat. I have seen dogs bloat on an empty stomach, before work, after, with yoghurt and probiotics and without, fed up, fed down etc. To the expert who disagrees with what Jeanette and myself have said, do yourself a favour and start reading about bloat/torsion. Just because you have never had it only means that you have been very lucky or that the bloodline does not carry those genes which cause it to happen. 3 genes have only recently been linked to it in the states and over time hopefully for all breeds it can be eradicated.

Called in the old books 'drum belly' the symptoms are belly expanded and tight from end of ribcage to pelvis, skin stretched tightly and if tapped the belly sounds hollow. Salivating, restless and can not get comfortable with the roached up. When checking gum colour it is much paler, and in torsion gums are white/purple from shock and pain and you will find the dog trying to vomit but can't. Also there will be froth lying in the kennel around the dog. Buscupan and DeGas will work in bloat only if in the very early stages, in torsion nothing except veterinary intervention will save the dog. All service dogs have a gastropexy when young as a matter of course.