The casino has the right to change the dice whenever they feel like it. But in most cases it happens when more players begin to win more. Even casino supervisors can be superstitious.
From a dealer perspective it is amazing to see that when a whole new set of dice are sent out in the middle of a hot roll, the shooter and the players almost never recognize that a new set of (5) dice have been sent out.
There are other reasons the house changes the dice:
They think that the dice are already old and the edges are worn down. They change the dice when nobody plays at the table.
The dice can be changed at the beginning of an 8 hour shift or in the case of a new crew of dealers. At the request of the a player, especially a high roller. Of course the casino is under no obligation to change the dice just because a player asks. The shooter can lose one of the dice while rolling. It's very rare that dice are actually lost.
Note: All dice sets are numbered and usually have the logo of the casino and the city and state location of the casino imprinted. Dice are cancelled after use with a device that imprints a small circle in the centre on the number 4 edge.

100% match bonus!

the sun won't set on winning at showdown online casino. the games are hot, the winnings are even hotter and there's always something to make your day. just say "yes" to over 60 sizzling online casino games, monthly competitions and prizes, and enjoy wild, wild winnings when you play at showdown today!