Being that I feed live, I offer on the same scheduled day. Never had a refusal thus far but I can always save the rat/mouse for another day.

There is a small risk involved as stated. I personally haven't ever ran into that issue. I figure the snakes knows whats best a lot of times. If he/she doesn't want to eat, they won't. If they do, so be it.

Once I get everything swapped over to F/T or start my own breeding colony so that I do not have to go and get the rats, then I will probably start skipping during shed.

Just my experience though. It is 'recommended' to skip meals during shed.