The breed comes in either the iconic full-coated 'rough' coat, or the sleek 'smooth' coat. Collies are medium-sized to large, agile herders with elegant wedge-shaped heads, almond eyes and gentle ...
Another possible reason to prefer a medium-sized dog is that your place is simply not large enough for a very big dog. Or maybe the strength of a very big dog may feel overwhelming; whichever the ...