My female rabbit has just recently had a litter of 5 bunnies. They are currently 12 days old and have their eyes open. Today when I was checking my female rabbit I noticed that one of the babies had wandered away from the nest and had gone to its mother. When I noticed I gently picked it up and move it back to the nest box to keep it warm (it is quite a cold day today; raining and such)

Is it okay if this baby is wandering away from the nest?