
I believe it, and have seen it, the higher the protein level we give ours, they start bouncing off walls, I keep the protein level to 21%, even when the Danes are growing up, the level is the same, to stop them shotting up in size to quickly, would rather they matured slowly, everybody has there own way of feeding, your higher protein levels are usually for smaller breeds, not your Giant breeds, who should be on a lower levels of protein, except for your working dogs etc..