My inspiration: https://www.youtube.com/watch?v=pOPYo4xj00s This is Sarah Cuthill's youtube channel and here is her website: http://fmicrofarm.com/diyprojects/
Small fodder system you can purchase: http://www.half-pinthomestead.com/
Homemade fodder system in "drawers": https://www.youtube.com/watch?v=V_hC4z6GZb0
Larger fodder system on an alpaca farm with good, informational videos about how it all works: https://www.youtube.com/user/Dabudsta