A friend of mine tried to donate dog food to one of the shelters due to the 20% cut in the food budget--imaging that. I still can't get over it.
The reason given is that they feed only one type of food and mixing with another type will/might cause diarrhea.
Possibly, but they ought to ask their vets about that. I know Feldman had introduced special diets and added higher quality food.
In any event, ask the shelters what kinds of food do they feed the dogs and cats and donate that kind of food.