The amount of bone that you feed makes a big impact on the firmness of the stools. More bone = firmer stools. Less bone = softer stools. Chicken necks, backs, and wings are VERY boney. Not much meat on those. Try feeding meatier pieces of chicken like bone-in chicken breast, thighs or drumsticks. Or you can add some boneless chicken to a meal that is high in bone, so a wing and some boneless chicken breast for example.
I generally don't like to add "extras" to try and manipulate the stools. If I have tried everything else, then I will add something like pumpkin, but only as a last option. Pumpkin will often "fix" constipation or diarrhea, but it is an artificial fix, you aren't actually taking care of the issue that caused the problem to begin with. So start with just adding some more meaty meat to the meal and see if that loosens things up.
I generally don't like to add "extras" to try and manipulate the stools. If I have tried everything else, then I will add something like pumpkin, but only as a last option. Pumpkin will often "fix" constipation or diarrhea, but it is an artificial fix, you aren't actually taking care of the issue that caused the problem to begin with. So start with just adding some more meaty meat to the meal and see if that loosens things up.
