not dry at night till seven, really? holy cow don't tell my son that! first off we had him in a toddler bed around age two, and didn't start potty training till he was almost three. he wasn't ready. once he was, there were no headaches, a couple accidents, and it was done. no, "all" kids don't train for poo and pee separately. we never differentiated between #1, and #2 - if ya gotta go, great. no matter what it was. he did both at the same time. the thing is, all kids are different so don't let anyone tell you "they do this" or "they do that". there are no rules, but for us, the key was doing it when HE was ready. i never pushed nighttime pt because i was just so thrilled he was doing so well on daytimes, and ONE pullup a day was acceptable to me, financially! (lol!) in the end he was waking up dry pretty much every night, with no pressure, a couple months after his third birthday. once he went a week waking up dry, i switched to undies, which he by that time knew, we try to keep dry. he did great. and all i did, literally, was praise him like crazy when he'd wake up dry. i think there is a natural progression to these things, and when done on their own timeline they happen quite effortlessly. i'm not sure why you would be potty training your child if you don't feel they're ready for a "big boy" bed. fall is so far away! my advice would have been to wait till he was ready, but also, switch to the toddler bed first. it's not really logical to teach him to go potty, good boy, you did it all by yourself, etc, then lock him in a crib at night so he can't get out. seems to send mixed signals, to me. and i'm an adult.