Just been trying to work out where my wifes, Grandfathers croft was in the Scottish census. Then I realised that I have no subscription to original images.
Anyway, just down the road from his Croft was a drinking fountain and trough for all animals and humans.
The half bowl, at the base of the 'column' was the drinking fountain. Troughs either side, and the small opening at the very bottom, in the center was for the small 'beasties'.
Found this picture, but unfortunately it has been turned into a flower arrangement, but it has been renovated.