I don't have a complete diagram you could check this to have an idea, [url =http://pinoyagribusiness.com/forum/empty-t228.0.html;msg1220;topicseen#msg1220]farrowing pen size[/url].
Try to ask your local cooperative, feed dealer or quedancor for such program. Maybe they could help you. Feed company have different projects in different areas, try to ask if they provide credits terms.