Just from looking, huh? I have a Czech dog myself, and boy have I been wrong in the past guessing on sight if a dog is Czech or not.
Czech dogs really don't all look cookie-cutter. Some Czech dogs are small, zippy, wiry, foxy-faced little speedsters.. others are heavy-boned lummoxes with heads like bears. In my opinion, some dogs to me 'look Czech' when they have a distinctly wolfy, foreign, exotic look to them-- slightly oblique set to the eyes, furred inner surface of ears, sable coat. But.. it's not so cut-and-dry. Here's my fellow. He's just 1o months in these pics, but his eyes are light, slightly obliquely set, and he's the bulldozer-build type but going through a growth spurt:


