At what approximate age will most Scotch Collies have achieved their full adult height?
Answer
By about twelve months of age
Scotch Collies typically experience their most intense growth during their initial six months of life. However, reaching their final stature—their full height—is generally accomplished around the twelve-month mark. While they achieve height by this time, it is important to note that they continue the maturation process, 'filling out' with muscle mass and developing adult chest width, which can extend up to eighteen months or even two years.

Related Questions
What is the ideal height range at the shoulder for mature male Scotch Collies?What is the typical body weight bracket for female Scotch Collies?Compared to their close relatives, the Rough Collies, how do Scotch Collies often appear regarding mass?In determining the height of a Scotch Collie, from what specific point is the measurement taken upwards?What is the typical weight range expected for an adult male Scotch Collie?At what approximate age will most Scotch Collies have achieved their full adult height?Regarding male weight, up to what point can a Rough Collie often exceed the Scotch Collie standard?Despite overlapping height measurements, why might the Scotch Collie be described as maintaining a less rangy profile than the Rough Collie?What is the primary focus for evaluating the physical condition of a Scotch Collie beyond its absolute weight?When comparing Scotch Collies side-by-side with show-line Rough Collies, what structural aspect contributes to the Scotch Collie appearing lighter in frame?What practical advantage does the Scotch Collie's moderate stature offer owners regarding daily management and mobility?