You just gave me an idea for the 2nd bin.If you use chicken wire for the compost cage, you can plant tomato plants around the outside, and use the cage to tie up the plants for support. This allows the roots to grow under the pile for their nutrients and a stable source of moisture.
NEVER use dog, cat or any carnivore feces in your compost! There are disease organisms that can be very harmful to you if you do so!I bought a composting bin from lowes and threw vegetable trash and dog poop in there. It was a waste of money for the bin and I should have built my own. On one of the videos I put on the site said you should have worms within a few days. Anyway that where I'm at.