[blackbelly] how many??

[Jessica Nickerson]

Hi,  I am sorta new to raising blackbellies and I really enjoy getting the info from the list.  I have a few sheep and @ 4 acres of fenced pasture,  they haven't put much of a dent in the grass and I was wondering how many sheep to an acre?  I would like them to keep it down as much as possible and still want to keep them on mostly grass.  If anyone could help that would be great.   Thanks for your time and hope to hear something,  Jessie