I have 5 ducklings. 2 are Pekin and 3 are welsh harlequin. They were born November 16th. The 2 Pekin are very big ducks and they are let out each day to play with the bigger ducks. They really enjoy it. We put them back inside each night but could they stay outside? We’ve had a mild winter here 30-40 during the day and 20-30 at night. Would it be safe to let the two big Pekin live outside permanently?