Autofeeder for dental food?

Any recommendations for autofeeders that will work well with the larger dental foods?

While my orange is a good boy, brushing his teeth isn't happening.

I have been free feeding him but the vet said he was just a bit over his ideal weight. I am often away for a few days at a time for work and while my partner is around, I like to leave him as little as possible to do in regards to pet care. I currently have a petlibro fountain and while I would have preferred to stay with the same brand (the less apps the better), the reviews are not great for the dental food (Science diet) as it seems to get stuck more than I'd like it to.

Any help or advice is greatly appreciated!

(cat tax in the comments)