What development timeline marker suggests that a young Koolie slowing down might require veterinary attention?

Answer

Slowing down significantly before the age of seven

If a young Koolie slows down significantly before reaching the age of seven, it may warrant a veterinary check-up to rule out underlying issues rather than assuming it is premature aging.

What development timeline marker suggests that a young Koolie slowing down might require veterinary attention?
animalDogExpectancyKoolie