Hello, and thank you for your question. Blue sure is a handsome boy! If you keep him unneutered until at least 1 year old, this will let him grow to his fullest potential. I would also make sure to feed him a puppy-specific diet until he is at least 1 year old, and seek out a large-breed puppy formula, which helps to prevent hip problems as he grows. I wouldn't worry as much about meat - the most important nutrients for growth at his stage are fat and calories (which are found in puppy formulas). Look for an AAFCO statement on the food you buy, that says the diet is formulated for growth stages.
I hope this helps, and that Blue is happy and healthy!