A snake killing a live animal is instinct, But they don't need the hunt of live prey in captivity as some people say, they go through the same process of striking and constricting whether the rodent is defrosted/stunned or whatever.

If the snake is happily eating frozen then why not keep it on frozen.(if it aint broke, dont fix it)

Do a search on here for "BP not eating" and you will see some worried people.

May be I'm a little bias as i used to keep rodents as pets when younger I don't see the point in throwing in a live mouse when it's not necessary, although some people get off on it.If it refuses frozen over a period, then thats a different story.

If for any reason i have to feed live then I will, but not out of choice personally for me.

Enjoy the new experience of snake keeping ( withever way you go about it)