I lost my Bloodhound last year to bloat/gastric torsion. We rushed her to the vet when we noticed how distended she was. Her gut had not twisted at that point, but for some reason the vet saw fit to send her home. To this day I feel guilty for not insisting on the surgery, and feel like I let her down. I stayed up as late as I could with her but fell asleep. The first time I got up to check on her she was sleeping, but when I got up the second time she had passed.
It really is a heartwrenching way to lose a dog (not that there's an easy way), thank God yours was saved. We had our new Bloodhound's stomach tacked when she was spayed, and follow the same guidelines we did with our old dog (and all of our other dogs). Nobody gets fed within an hour of exercise, or more than two cups of dry food at a time. We soak their dry food with a little hot water, and only feed high quality food that does not swell. It is important to limit water intake after exercise too. Our old dog would drink and drink, and she escaped the yard that afternoon in the middle of summer. After I put her back in the yard she must have drunk a lot, and she had eaten a lot of grass. It's inconvenient not to leave a big bowl of water out with large dogs, but it can make a huge difference. It is also important not to feed them when they are over-excited, e.g as soon as you get home, or if there is something along the fence-line to chase.