I have had 6 dogs at one time.
Experience is that dogs can be territorial. If you can, feed them in different places so that they don't get greedy and go for the other's food.
Breed size should dictate how much/often to feed a dog. I have a medium large mix right now and I put a couple cups of dry food in her dish a couple times a day. And she takes her royal time to eat it, unless I add something to it. But again, dogs can be very protective of their food dishes.
When I had multiple dogs, I tried one big dish and having them share. But it's hard to monitor who gets the bulk, so it's just better with individual dishes, private places. We had cages for them which each knew was their own, and it's just a wiser solution to stay separated for meal time. They can clean up any scattered stuff afterwards. Water would be another thing altogether. They aren't typically as jealous over water.
As far as bloat, been there done that more than enough. Some breeds are more suseptible to it. Deep chested for instance. I had setters. But I had a Shar Pei as well and the guy I bought her from related that w/in an hour after whelping, he was burying one of his from bloat. One thing I suggest to avoid bloat is to moisten your food down. Don't have dry food and water available at the same time. And after eating make sure they lay down and rest, no physical activity. Bloat has to be surgically treated and that's an expense and experience no one needs. Depending on the breed size, there's a time cap. Breeds like setters have about a 2 hour time limit before it becomes acute. Waiting 12 hours....I'm sorry (Carrie?) but that doesn't make any sense. Bloat is a condition where the dog CAN'T vomit or poop out the food, because the stomach has flipped over. The food is trapped, ferments, expands and thus making the stomach expand. Too much non treatment and it stresses the other surrounding organs and ultimately the stomach can burst, being fatal.
Learn the contours and shape of your dog in a healthy state. So that if EVER the misfortune of bloat happens you'll know your dog is not shaped like that. And get to an emergency vet a.s.a.p.