We Don't recommend them. Although they probably won't hurt anything, we don't believe that they are especially helpful either.
Septic tanks do a good job of breaking down sewage because of bacteria.
These bacteria are the same ones which are naturally present in the human digestive tract. Simply using your toilet is all you really need to do to keep supplying your septic tank with the bacteria it requires. You should never drive over your septic tank. The new ADEQ rules prohibit driveways over disposal areas and septic tanks, regardless of whether the driveway is paved or not. Save the dog food and the chicken.