My standard procedure is set up tank at least 24 hours before, let temps and humidity stable out. When snake gets to me i check it out completely then leave it in new home no food, no handling for one week, then i feed, if it eats i'll give it another week and feeding to be sure, then 48 hours after 2nd feeding i'll start 5 to 10 min. handling sessions every other day. As for switching to FT. I did it with a new girl, and she was doing well, just make sure the rat pup is warmed to 100 degrees and offer it, if she won't take it just leave it in over night and cover the cage, you might have to wait her out. Some switch easily, some are harder to switch, and some will never switch. Just be patient, and watch her weight. good luck, and don't foget to post pics, when you get some.