All my breeder bps started and continue to thrive on FT. My first normal from a regular pet expo that was claimed to be a CB only does live and that sometimes is not a guarantee. But i always offer ft the day before.
My Dumeril's boa used to be the pickiest eater out of any snake I have ever owned. She went two months refusing food, but one night I finally got her to eat live. She ate live for months, and during the Summer (In June or July) she accepted her first f/t rat. I bought her back in November on the 22nd at a reptile show. She didn't eat until January, so it took me 5-6 months to switch her over. She still sometimes gives me a hard time with f/t rodents, but at least she eats.