My veterinarian gave me something to force feed my ill guinea pig. Why can I not just feed dissolved food, applesauce or baby food?

An ill guinea pig has, because of its situation, nutritional shortcomings or the need for extra nutrition, where ‘regular’ food, applesauce or baby food cannot suffice. Applesauce and baby food contain sugars which are useless for your guinea pig and will not have extra value in critical situations.