Goats, along with sheep, have a peculiar stare, sometimes vague and batty, sometimes sinister and glassy.  This reminds me of a description of sheep’s eyes by Vasily Grossman, as being like glass grapes.

‘Goats stared with eyes like oracle stones.’

Source: Russell Hoban, The Lion of Boaz-Jachin and Jachin-Boaz (London: Picador, 1979), p. 141

Photo credit: JACLOU-DL at pixabay.com