In my area, there is a group of Danes and Mastiffs that meet for weekly play dates. We were talking about the appropriate nutrition for a growing giant breed puppy, and there was some controversy on some of the topics. Just hoping for some more perspectives, I guess. I know it's important to be careful about calcium and phosphorous levels for a *growing* giant breed puppy, but what about for adult giant breeds? Is it the same range? Is it as strict? If there is a difference in growing puppy and adult needs, how long do the puppies stay on a more strict calcium phosphorus ratio - for the first year? First three years, until they're completely done growing? And if the kibble doesn't already have glucosamine/chondroitin added in, should supplements be given? Starting at what age? And lastly, has anyone heard of the Victor dog food (specifically the grain free formulas)? I poked around on their website, but didn't see anything that listed calcium and phosphorus levels. Thanks in advance!