Hi Brenda,
Just wondering, how does the fiber compare in the new formula to the old? Did you do a slow transition to the new food? What kind of ingredient changes were there? Did they add legumes? Chickpeas and lentils are common culprits. It could very well be an intolerance to whatever the new ingredients are. Not that this helps right now, but this is one of the reasons why it’s a good idea to find several foods your dog does well on and rotate between them. That keeps the pup’s gut healthy and more tolerant of ingredient changes.
It’s also possible that your pup may need a bit more / or possibly less fiber. If he needs more fiber, you can add that to his food with some ground Chia seed or canned pumpkin.
In the meantime, try adding a spoonful of plain, canned pumpkin to his food. Pumpkin regulates intestinal water and adds bulk to the stool. That usually will help the stool firm up pretty quickly while you get a handle on things and possibly look for another food.
