Installing a septic system for kennels?

First start with your slab at 1" of fall for every 10', weather you fall left or right don't matter. Give the slab 1" of fall to the back of your entire slab. I used concrete blocks for my walls then built my panels on top of the block walls. At the back of each wall cut a 3"x3" hole in the bottom. All the poo will flow from pen to pen as your spraying them out until you get to the last pen. When I poured my slab I put a water box drain in which was formed in to be flush with the slab. Spray poo into the drain and it flows into your septic. If you have no clue about septic systems I would suggest you have a company install it. They are tricky to keep everything flowing. Also I highly recommend that you install a filter on the back side of your tank which will help keep dog hair out of your drain field. It will clog and fail if not. And if you have a bunch of dogs I don't suggest the a 55gallon drum system you will have to have it pumped out every week or two. More harm then good. Dog poo don't break down like human poo does. I have a 1050 gallon concrete tank and have to have it pumped out every 6 months with 16 dogs.