I would fast him for 24 hrs. and start with rice and boiled chicken for his first meal after that time is up. Kaopectate works well too. Nutro isn't the best but it's not the bottom of the barrel. I'd suggest that the bullystick could have sickened him worse than the kibble, esp. if it's the same kibble he's been eating. If he ate many hot dogs that could do it too, since they are fairly greasy.