Hauff, welcome! From my own experiance. It depends on how your dog eats. If he constantly will eat whatever is placed in front of him; like my Lab, I'd suggest feeding him the suggested amount that it says on your dog food bag (It has weight sections) If he only eats when hungry, like my older dog, then leaving the food out all the time wouldn't be a problem. Thats what we used to do with him anyway, and have no problems.