It is time for change.
One sheep, should (IMHO), be called a ‘Shoop’ and a baby ‘Shoop’ should be called a ‘Shop’.
I know that, to save confusion, we would then probably have to rename the old ‘sell-stuff, buy stuff’ “shop” places to something else – perhaps they could be called ‘Buy-Places’ – and then we would be sorted out for the duration.
Sheep could relate to sheep numbering 2 to 20, and ‘Sheeps to 21 Sheep and above (‘To Ovinity, and beyond!’ you might say).