Advice for transitioning to cribs!

Lil Kate

I need help. My girls are 4 months and have only napped and slept in either swings or rock and plays. Last night was night/ say 1. Twin B did ok for 2 naps about 30-40 mind each. Then slept about 4 hrs in crib at night waking every hour. Twin a is super fussy and would only sleep 10 minutes at a time in the crib. Did you transition them at the same time... They were great sleepers until a month ago when the got sick and now wake 2-3 times per night. Figure since they are already up now is the time to put them in cribs. Any advice would be great.