Now the schedule of events in the auction building looks like this:
Day 1 - Slave auction
Day 2 - Exhibition
Day 3 - Nothing
Day 4 - Slave auction
Day 5 - Fighting tournament
Day 6 - Nothing
and so on...

Tournament starts at 13:00, but you have to hurry, as where are only 4 petgirls participants in the tournament. Before fighting starts, you can place a bet on a petgirl, and you can do it regardless of whether your petgirl is participate in fight or not. Winner petgirl receives an award "Tournament winner", and her owner receives 5000$

You should note that during fighting in arena or in aviary your petgirl can be injured, and this must to be treated in the hospital. To do this, you will need to call the nurse and give her injured petgirl for 2 days.