[anonymously]

I agree, mention this to your vet (I am assuming medical issues have been ruled out)
But, I am thinking that trying a smaller kibble or pre-soaking and adding some wet food might solve the problem. And eating slower will help, obviously.

Remember, no one is here in a professional capacity, opinions are being offered, not to be confused with medical advice by a veterinary healthcare specialist.

I used to think the supermarket dog foods were okay. I pre-soaked a middle of the road kibble and it turned into mush/sawdust. I presoaked a couple of the more expensive brands that I mentioned in a previous post and they stayed firm, just softened a bit……..solid food.
My veterinarian agrees with me. I don’t think all cheap dog foods are harmful, just, of lesser quality.
That’s why I like to use the kibble as a base and add something.