I have a little one that is not overfed that seems to go a lot too (grain-free Nutrisca). Some dogs are just like this, you could try half grain and half grain-free. Stay within the same brand and mix. That might decrease the amount of bowel movements.
It could be the grain-free, chickpeas and such.
Hope this helps: https://www.mspca.org/angell_services/choosing-the-right-diet-for-your-pet/ Grains aren’t always a bad thing. Are you adding anything to the kibble? I add things, like a spoonful of cooked chopped chicken or srambled egg….
