Hi Krista,
In regards to unbalanced additions to the diet, the “rule of thumb” recommendation from veterinary nutritionists is that no more than 10% of the total daily calories come from unbalanced sources. Because of the different water contents and fat contents of potential toppers if you follow a % rule based on volume you could cause nutritional deficiencies or excesses. 25% of the diet based in vegetables is very different nutritional profile than 25% of the diet of added meat with a fat content of 20 %.
