The term "rich formula" does not have a specific or commonly used meaning. It could refer to something that is abundant, generous, or plentiful, but it would depend on the context in which the phrase is being used.
Sentences with «rich formula»
With all natural ingredients, it presents a lower carb and protein rich formula which will help your dog live a fulfilling life. (aplaceforanimals.com)
A six to eight pound cat will usually need only 5.5 ounces of a premium, or very high value, nutrient rich formula of cat food twice a day. (second-opinion-doc.com)
This antioxidant - rich formula contains high - quality lamb meal and a powerful blend of wholesome vegetables and fruits. (earthbornholisticpetfood.com)