Have you tried a treat dispensing ball? I have a wide variety of them that I used when my dogs were on kibble as puppies and they're awesome because they really slow the dog down and require them to think and work to get their food.
I like this one for dogs that are nondestructive:
But if you think he'll try to chew through the toy to get to the food, I would recommend getting a large Jolly Ball egg such as this: https://www.indestru...ariant=62499482 and drilling a hole in one side right where the curve of the egg rests on the floor when you set it down. You can drill whatever size hole you want, but I made mine pretty small so that it wasn't too easy (and be sure to soften the edges so they are not sharp). Of all the treat balls I have that is the most indestructible, difficult, and time consuming one. Rune took out a LOT of frustrated energy on that thing as a pup and it's still in commission today I may have a video of it in action from when Rune was a pup if you're interested in seeing that.
My guys are on raw now, and they don't chew their food either... but dogs aren't really designed to chew. Their natural 'style' is to shear off appropriately sized hunks of meat with their molars and swallow whole. It's very fascinating to watch.. my guys get a lot of wild meat from whatever roadkill I can find and they do a fantastic job sharing whole prey together (turkeys, beavers, deer, etc). It's like watching a nature documentary...and they do eat pretty quickly, but because it's meat it goes down pretty easily and they never have a problem.
What a great idea!!!! Wyot gets mostly raw, with kibble (Orijen) in between, when I haven't had time to go shopping, or there isn't any fresh kills (it doesn't last long, as the birds, coyotes, and foxes will tear anything and eat it quickly). We found two out of four leg bones, with the deer's hoofs still there two days ago...Wyot still found something to snack on, though, lol! It IS like watching a nature documentary! We have friends who have a home in our town, but they are weekenders, who live in the city. Wyot runs circles around the dog (he's a very young 5), leaps like a jack rabbit, and found a dead bird while they are running around in the woods....and it is hard for them to understand that this is the normal way for dogs- they were a bit horrified (ok maybe a lot, lol), that Wyot tore into it with gusto. I explained, and I give them credit for listening and sort of getting it (NOT our dog...he's not even interested)..poor desensitized animal. I bet, though, given time if he lived here full time, he'd start with what was natural to him. They said he ate garbage in the city - cooked, discarded chicken wings- MY turn to be horrified, and explain that cooked bones are a problem, as they can splinter. ...
Maybe it's not how fast they eat, as long as their digestion is running at optimum, and there are no choking problems.
Thanks for the info, woodrat!