György in Hungary shares this photo of two puppies from his first litter. Even as puppies, the Kuvasz eye shape is distinct.
“The slanting eyes are special, quite unlike those found in any related kind.”
From: Pál Sárkány and Imre Ócsag, Hungarian Dog Breeds, Budapest, Hungary: Corvina Kiadó, 1977, 2nd ed. 1986, p. 104.