From what i understood from talking and reading to people is that LB adult food is a gimmick. Your dog is already finished growing and if you are buying it for the Glucosamine/Chrondritin the amounts in the food isn't even theraputic. You can buy the tablets and give them yourself at a level they will benefit from.

The puppy food is good because it does help them grow at a slower pace and like some others have said it does help with joints and so on... I did feed Presley LB puppy food but now she is on an allergie food which doesn't come in a puppy formula. She has done well on it.