When it wasn't so hot I left mine on the counter for several days when we were gone. I didn't instruct my babysitters to stir it. I guess it depends how warm your house is. Do you keep it fairly dry or water over the top? If it's wet you can just have them stir before feeding out.
I do keep it fairly dry, and our house is usually about 72 degrees. If it did go bad it wouldn't be a huge loss, since it's a smaller batch.