* Individual variation: Like humans, dogs have different builds, fitness levels, and motivations. Some Rough Collies might be naturally faster than others.
* No standard measurement: There's no official test or competition where dogs are timed for their top speed.
* Running style: A Collie's speed can change depending on the terrain, distance, and what they're running for (e.g., chasing a toy vs. racing).
General Information:
* Rough Collies are known for their agility and athleticism. They're bred for herding and are capable of bursts of speed when needed.
* Their speed is likely comparable to other medium-sized breeds, like Border Collies, Australian Shepherds, and Labradors.
* A quick Google search will show you videos of Collies running, but those are not reliable speed indicators.
In conclusion, while Rough Collies are fast, it's impossible to give a specific speed in mph without individual testing.