I'd add as well that you prepare ahead for a refusal so you have something rodent safe to keep that mouse in for another week as well as something to feed it and a mouse water bottle.

Remember when you live feed to drop the rodent into the enclosure as far from your snake as you can. This allows your snake to sense the prey and set up it's strike properly. Makes for a far safer live feeding situation rather than the snake basically having something with teeth dropped suddenly in front of it's face.

Don't be surprised to see the live prey wander right over and sniff the snake. These rodents raised in captivity really seem to have next to no prey instincts and don't seem to have a clue that what they are walking up to is going to make them into it's meal.

Personally I don't give our snakes more than 10 to 15 minutes with a live prey item before I remove it. Most are on their prey within seconds and even the slower ones generally hit within the first 2 or 3 minutes after the prey is introduced.