Step 7: The doors
Cut two vertical pieces and two horizontal pieces for each door, sized to fit within the plywood perimeters. Line everything up square and put three staples in each joint. Flip over carefully and repeat on the other side. Then put a staple on the top or bottom edges of the joints. If you give the frame a shake and it seems sturdy enough, great!. Otherwise, add a few more staples, or use longer staples.
Cut out the fencing to fit within the doors, and staple it to one side.
Attach your doors with the hinges and install the latches.