Not only do dogs get gas when they ingest too much air but it can cause a problem called VGD in larger dogs. This where the stomach literally does a "flip", when this happens the part that leads to the bowels can become twisted. It can be a life threatening condition and may require surgery to correct.
My dogs are 200 lb Rottweilers and to get to a dish on the floor they have to spread their front legs way apart, so it's easier for them if the dish is raised so they can get to it comfortably :) and yes, I love my dogs tooooo much
Big dogs are susceptible to a condition called "bloat", a life-threatening emergency that can kill a dog within just a few hours. Elevated bowls help to keep his internal organs in place and allow him to eat without swallowing a lot of air.