You should feed your snake an item about the same size as the snake at the thickest part of the body. I feed mine mice even though they are big enough for rats. I just think that small items are better then big items.
Well if you have a non-feeding royal then don't worry too much. One royal has gone 22 months or something without eating. So don't panic.
But there are a few tricks that you can use to try to get him/her to eat.
1- Use a different coloured mouse/rat. Use black or brown.
2- Use a gerbil, these are similar the mamals they would eat in the wild.
3- Leave the prey in over night as these predators are nocturnal.
4- Place the prey in a box and leave it in the snakes enclosure, this wil represent the hunting the snake does in the wild, going into the preys burrow.
5- Prick the prey's nose so blood is drawn, this gives the snake more awarness of the prey and may put it into the hunting mood.
6- Similar to No. 4 smash the head of the prey item to reveal its brain, will drive the snake even more in the mood.
7- Use a lizard, most places do not sell frozen lizards but you can find them, lizards are also a prey item it will eat in the wild.
8- Wiggle the prey item as if it is alive
You do not really need to do this in any order they are just tips.
nesting material is needed. ALWAYS WACTCH THE PREY IT MAY ATTACK THE SNAKE, IF IT DOES REMOVE IT IMMEDIATELY
OR HOW ONE SNAKE BEGAN CONSTRICTING THE PREY, MANAGED TO GRAB HOLD OF HIS PARTNER AND CONSTRICT THAT WITH THE MOUSE.