It's difficult at the beginning to find that balance when you're trying to work out how much you actually get through. I did have a few times when I realised what I had left wasn't going to make it to my next planned delivery, so I just amended my subscription to bring the date forward. I found a great balance in the end and I usually have a several kgs left as my next delivery is made. It does help I have the ability to store a lot of hay - I buy four 5kg boxes a month but usually still have part of one left (in use) at the point of delivery.