it comes in 30 day bags. it says 1 and 1/2 cups a day (it comes with a measuring cup) I've been giving 2 full ones a day. They eat it really well. Have a sunseeker steer on it for 33 days and he has the hair O0 I have been cool rooming and going by the "if you haven't worn out a rice brush, you haven't brushed enough" saying.