Raising Chickens (or other animals) on a septic field

Does anyone have any experience raising animals specifically chickens on a septic field?  We are trying to figure out in theory how to maximize a small farm's potential.  One the ideas is having chickens and moving them around.  Assuming these would be dual purpose or a mixed flock, would we have any health and disease risks with them being in the septic field?

I work on a farm where approximately 350 laying hens have access to an area that is directly over the septic field. There are no problems as far as I can see. We rotate their grazing area with moveable fencing in order for the land to recover. So basically, they have access to this 'septic' area for about a month or so, and then it moves to the east of that for a month, then to the west, and then back to the septic. The biggest concern i've seen with pasture raised poultry is giving them plenty of access to shade in the summer heat.

That would be my recommendation, and not specifically to septic fields only. Make sure to move the area that they are in frequently or they'll make it pretty barren.

Maybe others have other suggestions. Good luck! joe

Thanks for the information.  I know you said they are they are in each area for a month.  How long have you been rotating them to the "septic" area?  Has this been a long term practice or relatively new?

I believe it's going into the 4th year of them having chickens in this area.