For a long time, it was thought that Rottweilers stop growing from 20 to 25 weeks old. This myth came about due to a misunderstanding of the terms used by veterinarians for determining canine development stages.
The size of a pup is no indication as to what will happen in adulthood. Every dog starts out small and grows proportionally over time, but you can’t predict the ultimate size or shape of an adult dog until they are fully grown. It’s not uncommon for mini-dogs like Yorkies and Chihuahuas, for example, to grow up into full-sized adults because this variation is genetically possible in some breeds even though it may be rare among others…