I feed Chino this stuff called Blue Buffalo Chicken & Brown Rice for Puppies. The food is really light colored, so his poo comes out really light, it looks like pumpkin pie filling. He seems to take well to the stuff. Cost about $50 for a 50lb bag. What is THE BEST food in a 50lb bag btw? I was looking at the Orijen...ingredients sound really good. Any idea if it comes in 50lb bags? And roughly the cost?