When is the best time to transition over from LBP to CLF or STP?

This depends on the breed. Most medium to large breeds between 25kg and 60kg fully grown will stop their rapid growth stage between 8 to 10months so it is best to transition then, while at the same time moving to adult portions which are smaller by weight than the puppy portions.

Great Danes take the longest to grow and can be in the rapid growth stage for up to 2 years, so transitioning around 18-24 months would be recommended.