Dog Show is a one day tournament running on Monopoly GO (Nov 14-15) at the same time as Tax Refund.
Here is the leaderboard list for the final placing rewards in the Dog Show tournament.
As you play through the tournament, there are 30 milestones to get past, all of which will give you a gift, which would be dice, money or stickers. Complete all milestones for the final reward of 1,300 dice.
Points for tournaments in Monopoly GO are scored by landing on any Railroad tile and playing either Shutdown or Bank Heist.
Bank Heist
There is no way to tell if you will get a Shutdown or Bank Heist when you land on a Railroad and no way for you to get the game to give you one or the other. It's pretty much random.
In tournaments you are grouped with 49 other players, check the group points before you start to challenge for the top sports as some people score some incredible in these events.