With grass currently taking a painfully long time to grow, and grass not guaranteed to give you hay if you cut it down, animals are currently not even worth keeping. So I would like to request a mod that gives Hay a 100% drop rate from cut grass.
they buffed grass growth, but I guess like herman925 says, vairable grass growth is somewhere here in the forum. You can buy starter grass from Pierre for 100 and spread them around your farm. Cut down some trees to have more room for the grass to grow and easier to spot.