Our weim was an inhaler too and I worried about bloat. We had him trained to "look at me". He would stop for a second or 2 and look at me, so it slowed him down. We also made him "wait" a few seconds after we placed his dish down.
It takes time and practice, but "look at me" is one of our basic commands that we teach in general to get their attention.
Might interject it into your training regimen, as well as food training. Don't get excited when you feed, feed smaller amounts 3 times a day if possible.